It has a fantastic atmosphere and is pretty darn funny, but I polished it off solo in about three and a half hours. I cruised through it with my level 50 soldier and never even got my shield dinged down.  You can really tell Gearbox had fun making this though, with all the little references littered about the world.
 
Now this may be because I played through it on playthrough 2, and not playthrough 3 since I haven't beaten the game a second time yet. Hopefully playthrough 3 bumps up the difficulty of the DLC.  There is no level cap increase and all the achievements you can get by yourself.

It also seems that the Braaaaaaaaaaaaaaaains! mission is either broken or well hidden, as I never got it through my playthrough and I did all the missions.

Did you manage to get either of the secret achievements on your run through?

Both of the secret achievements are awarded for completing things along the way of the main story. The only hard achievement is the Braaaaains one which I figured out a half an hour later. 1125/1125'd now.

" Did you manage to get either of the secret achievements on your run through? "

I didnt think that there was a playthrough 3

Ah, I thought it just threw up playthrough 3 proper.
 
 I highly suggest not running this with a level 50 if you want any challenge.

I'm kinda bummed that there is now raised level cap.  I quite playing as soon as I hit 50 cause I thought there would be a chance it would come with this DLC pack.  How is the loot in the expansion?

Since the level cap isn't raised, the loot is much of the same. The only two differences is that sometimes it comes on top of a hulking enemy's back and other times it's vomited up by a delightful man. Also, there is a new vending machine that you open up later in the story. I didn't see anything too special in it.
 
Keep in mind I'm still using a level 20 purple SMG.

Damn this isn't out on PSN yet, atleast in North America : (

It went up at about 2AM PST, or at least that's when I saw it on the live marketplace. I decided I would till it's soil until it gave up all it's earthly achievements to me.
 
Though a tip for everyone, hit the bottom left of Hollow's End as soon as possible.

While I enjoyed some parts of this game at the end I found that I just couldn't get with it. There were just too many faults that kept reminding me that I am just not having as much fun as I should be. This game needed some focus. 

What are the acivments like? I wanna keep my S rank

Four of them you'll get during a normal playthrough, including secrets. The fifth is a somewhat secluded quest tree that requires you to headshot 435 zombies.

It took me about three hours or so with a level fifty, you don't face anything over forty six. So I wouldn't suggest rolling through it with a fifty if you're looking for challenge. I enjoyed the humor and setting of it, more so than anything in the main Borderlands quest. The end boss in particular is very enjoyable, as pretty much all the dialogue held within the game.
 
I'd say it's certainly worth ten dollars if you were really into Borderlands like I was, but need new missions and objectives to drive you through. It's safe to say that it has more of a story than the main game, too. The opening storybook scene sets the tone for the rest of the DLC pretty quickly, the main storyline isn't always joke central but the side missions usually are. Especially all the ECHO recordings you find.
 
Even though I'm completely done with it now in less than six hours, I'm still satisfied with my purchase and the price point. Hopefully future DLC continues with the light-hearted and somewhat campy tone.

The achievements aren't hard at all. I got mine at like 4 AM this morning when it updated here on XBL, I think it's because of my time zone or something. 
 
It's amazing guys, the world is pretty big for a DLC and it's even funnier than the original game. Like, insanely funny. The enemies are awesome, but I didn't have time to run through it with my level 50 Hunter who beat 2nd playthrough, so I think it'll be even better then.

Is this Zombie Island DLC end of game-specific content? I haven't finished playthrough 2 yet, so do I need to finish playthrough 2 to be able to play this?

I really liked it, if it was a bit easy. Seemed to be a DLC that Gearbox made to be funny

" @Kouerson: I wanna clear some things up about this game. First of all for those who are saying they didn't face anything above level 46.......that's because you didn't complete the 2nd play through. I have beat every quest in the game on both play throughs and when i went to The Island every enemy is 50 or 51. Once you beat the 2nd play through there is no 3rd play through but the game resets and enemies are auto leveled to 50 and 51. This DLC is more than worth the $10 bucks. "

" @borderlandshunter said:

" @Kouerson: I wanna clear some things up about this game. First of all for those who are saying they didn't face anything above level 46.......that's because you didn't complete the 2nd play through. I have beat every quest in the game on both play throughs and when i went to The Island every enemy is 50 or 51. Once you beat the 2nd play through there is no 3rd play through but the game resets and enemies are auto leveled to 50 and 51. This DLC is more than worth the $10 bucks. "

Eh I still wouldn't of had any problems with it though just due to the enemy type, I can handle 50 crimson lance easily with my soldier. "  

The action in Island of Dr Ned is as solid as the main game, and the undead enemies and their little tricks and effects are a cool spin on it. The main issue I have with it is that, other than the offbeat humour in the storyline and side missions, there isn't really any tangible unique reward for max level characters. They could have at least given you some kind of in-game trophy or a few unique horror-themed items, but the mobs and bosses drop the same old stuff as in the normal game (usually a bunch of white junk that's good for merch fodder). The size of the package is pretty awesome for DLC standards, but the zones themselves are fairly empty content-wise. There's only one sidequest in most of the zones, and having only one or two things to do in each zone before you never have to go there again sort of makes those big zones feel really empty.

" It also seems that the Braaaaaaaaaaaaaaaains! mission is either broken or well hidden, as I never got it through my playthrough and I did all the missions. "

" @Kouerson said:

" It also seems that the Braaaaaaaaaaaaaaaains! mission is either broken or well hidden, as I never got it through my playthrough and I did all the missions. "

The Brains quest line starts at the southwestern portion of Hallow's End.  There's a great surprise down there.  It's also a fucking GRIND.  None of the brains you've collected so far count towards it....and given that you've gotta get a total of 435 zombie brains to complete all the quests in the quest line...LOL...  I will say that I thoroughly enjoyed this DLC, mainly for the laughs.  This DLC has more comedy than the base game does.  Best line in the game was from the Claptrap (Dr. Ned's Claptrap) at Jakob's Cove Bounty Board:  "Hey!  HEY!  (pauses, you look at Claptrap, Claptrap points at your feet) I pooped right where you're standing."  "

Ah, so you can access the DLC in your second playthrough, even if you haven't beaten it yet? Do you have to get up to a certain point? Wouldn't matter though, I already maxed out my level, and if I had to get to a certain point, I'd almost be there.
 
Damn Gearbox, stealing my 1000/1000G away. :(

" @Kouerson said:

" It also seems that the Braaaaaaaaaaaaaaaains! mission is either broken or well hidden, as I never got it through my playthrough and I did all the missions. "

The Brains quest line starts at the southwestern portion of Hallow's End.  There's a great surprise down there.  It's also a fucking GRIND.  None of the brains you've collected so far count towards it....and given that you've gotta get a total of 435 zombie brains to complete all the quests in the quest line...LOL...  I will say that I thoroughly enjoyed this DLC, mainly for the laughs.  This DLC has more comedy than the base game does.  Best line in the game was from the Claptrap (Dr. Ned's Claptrap) at Jakob's Cove Bounty Board:  "Hey!  HEY!  (pauses, you look at Claptrap, Claptrap points at your feet) I pooped right where you're standing."  "

Hands down the funniest part for me was the Frank 'n Bill joke.

Definitely have to agree on the DLC being funnier/better quality than the actual game.
 
I really wanted to come here just to put my thoughts though...anyone else get the feeling that everything else that happened in the DLC wasn't really real? Like, I could totally see it all being something that Marcus made up and told a bunch of kids at storytime...which leads me to also believe that everything in Borderlands (the main game) could be also entirely fabricated by Marcus. But, I guess that kind of stuff is suited for a more serious discussion.

" Ah, so you can access the DLC in your second playthrough, even if you haven't beaten it yet? Do you have to get up to a certain point? Wouldn't matter though, I already maxed out my level, and if I had to get to a certain point, I'd almost be there.  Damn Gearbox, stealing my 1000/1000G away. :( "

I just finished playthrough 1 last night. I did the Zombie Island right after that using the 1st playthrough.  I am currently at level 38 and find it quite easy with my Glorious Incendiary Machine gun, but then I ran into Lvl 38 2 of them Baddass Tankenstein's and none of my elemental guns worked on them or even my lvl 37 Eridian cannon that dealt 849 damage.  they also regenerate their health quite easily. I died very frequently.  they didn't follow after crossing the lowered bridge to Dr. Ned, however they ran in after i kept harrassing them thinking they wouldn't follow. x_x

I played the DLC in playthrough 2 starting at lvl 38, i think it was, and the game was reeeaaally hard for me. Seems the level matching system's kinda strange to me. 
 
Though, ;like this post says, i really liked the atmosphere a great deal but there was a lot of obnoxious design decisions i found. If the DLC was too easy for you then you probably didn't notice any of them but it was really killing it for me. Main problem being that it seems any projectile that hits you slows your character for awhile, whether it be the tankenstein throwing something at you, or the zombies puking on you...which they can do with pin point accuracy from a fairly great distance...all these things are especially annoying as you're just trying to run to safety or run past a group of zombies.
 
Though it took me forever (seemingly), it was a pretty quick romp and not as content heavy as it seemed in writing but $10 is a fair enough price for what you're getting...i enjoyed it for the most part.