I haven't beat New Super Mario Bros. Wii yet, but I'm on the last World, about to. 
 
Kinda just wanted to take a breather and surf the net, before I make my final go at it.  Also, I'm kinda sad that it was so easy, especially when I read it was supposed to be all hard and stuff.  
 
Wish they had Veteran Mode like in Modern Warfare 2 (which I still have to beat the last 2 levels of that game, for 100% Veteran Mode completion).
 
Who else is in my same boat and feeling slightly underwhelmed by this game? 
 
EDIT:  I beat it a few hours ago, but have to say I am enjoying going back through collecting all the Star Coins... at least final Boss/ending was kinda cute with a couple of nice surprises.

Have mario games ever been hard? Just simple and fun.

It's that short? Jesus...
 
It's really meant to be enjoyed with friends but that is really really short. How many hours did you clock up?

Easy...? This game has been far from easy for me, it took me 12 lives to beat 2-2 for example. 

I think it's nice fun. Just played through a few levels with a friend. Hard to play it with anyone who gets easily pissed about games though, so I might just go through it myself.

Am I correct in assuming you skipped worlds using cannons and such?
 
 
I find it hard to believe you beat every level from all 8 worlds in 4 hours.

Luke, you cannot be considered the "standard" for Mario players.  You excel at it, sir.  Therefore, take your 4 hours...multiply that by 3...and that's a more realistic idea amongst these other folks out there. 
 
Besides, the first game can be beaten in, what, 11 minutes with warps?  Meh.  4 hours is just fine.

Get some friends, you ;p

Well, I did find the Warp from an early level to World 5, completely by accident (I won't say where exactly, as to not say any spoilers) and I just rolled with it, but I'm guessing this game is like a 5 or 6 hour game, on average.  I wonder what the speed run times are gunna turn-out to be? 
 
Anyway, I will be going back through and try to get all the Star Coins and what-not... maybe play trough again with the girlfriend in co-op, but dang-nabit, Mario games need like 20 Worlds now-a-days, I say :p 

I've really been enjoying the game but yea it's a pretty easy Mario side scroller.  It's nowhere near as hard as the early Mario games, Mario 3, World or any of those.  Overall I really like the game though, I feel like they got most everything right.  I've also played some 2 player and that was a ton of fun too.  It's definitely my Wii GOTY 2009.  As far as it goes I enjoy the single player content of NSMBW more than MW2.  MW2 replaying SP is just a matter of playing on a harder difficulty, while NSMBW has a ton of secrets, which I am interested in finding and playing myself.  Obviously MW2 is about the online MP though, so you can't compare.
 
My friend was able to handle coop play just fine, which makes me think the game will be easy for most everyone, but it's still a really fun ride.

4 players dude.  Do it.  Record it.  Post it.

Looks like i am the only one here who is having a tough time with it single player.
 
@Jeff said:

Or they're playing multiplayer, which is sort of inherently harder since you have to deal with other people.

I wonder how long it'd take to collect all 3 coins on each level. I didn't bother moving on in NSMB DS on my first play through until I had reached each coin.

" I wonder how long it'd take to collect all 3 coins on each level. I didn't bother moving on in NSMB DS on my first play through until I had reached each coin. "

I was never that good of a mario player to begin with so i'm enjoying the challenge.  Once i've played the level a few times it's of course a little easier but it's managed to charm me.  I'm just happy as a clam playing a new 2d mario on a tv screen.  It feels like christmas all over again getting my Super NES and playing Super Mario World for the first time. 

" @eroticfishcake: About 4 hours. "

well the multiplayer probably multiplies that 4 hours by 5 which is one of the main reasons i'm getting it

I just put-up my 3rd review on the site, which is for this game... let me know what you guys think :)  
 
  http://www.giantbomb.com/new-super-mario-bros-wii/61-26841/user_reviews/?review=11558  

Am I the only one who thought Mario World was a really easy game (then again, I never really thought World was that great of a Mario either)? 
 
Outside of those special levels like Tubular, World was a cakewalk. Even Mario 3, which seemed so hard when you played it as a kid, if you go back and play it today you'll breeze right through it with barely any problems.

Dude the game is aimed at the hardcore AND the casual. If they made the game crazy hard, the casual players wouldn't be able to play through it.

So you beat every level and it takes only 4 hours?  Super Mario World to go through the long way is much longer.  I dont know why Nintendo and other companies insist on using 3D graphics sometimes.  The game could have looked much better, maybe even been in 720p if they wanted, if they had done 2d sprites.  I suppose using 3d might be easier for the animation so that they dont have to draw every sprite animation. I dont know, but i suppose this is the way things are.  You dont see Mario art work without him being 3d instead of being hand drawn.

I beat the original super mario bros. in like 10 mins because I used warp pipes and skipped most levels. So did you. If you played through every single level I'm sure it would be more then 1 sitting.

I've sat down to play it in a couple of sessions so far and i'm at the end of world 1.....
 
maybe i'm just slow?