Just finished playing through the demo and it has definitely won me over. Going to go down and pre-order this tomorrow after work. 
 
A few things I want to see in the final version:
1. An speed run obstacle course like arena to boost and mess around in. 
2. More smoking.
3. Smoking while knee boosting.  

Okay on a serious note though, maybe melee shouldn't drain your entire gauge. 
 
What do you guys want to see? Or what do you predict?

A jump button or vault button would be nice. Because there were times when I was standing beside cover I wanted to get over. And I would have to take cover and then more over top of the cover.

Yeah that demo kicked all sorts of ass. The only thing I would say is they should somehow make it so when you slow down time, you yourself get to move slightly faster. I felt like everything was just slightly too slow. And maybe make it easier to go right into cover from knee-boosting. Although I might just be bad at that.

I didn't care for the demo at all. I feel like all the elements that are supposed to separate this game from the loads of other 3rd person shooters, like all of the speed stuff, were not implemented so that they were vital to the gameplay. I wound up playing it like I would any other shooter, by hiding behind cover, popping out, and shooting over and over again. Not to mention the whole personality of the main character was kind of terrible. I went in with an open mind and not knowing all too much about this game, but it left me unimpressed. I'll continue to keep an open mind until the reviews hit.

I thought it was cool, but I don't know what the smoking does.

I liked it. I boosted all over the place in slow mo just because it was so fun. I can see myself spending a couple hours of combined time just zooming around playing pretend like a kid. =3

I downloaded it, but I haven't played it yet due to DR2: CZ, but I've heard nothing but good things.  I'm excited to try it out.

I just saw the Video and it looked great.

I want some sort of customization on the armor, or at least the ability to upgrade it's functionality so it can take more damage/boost longer and the like.  With all of the unlockable content that Bayonetta had, I'd actually be amazed if there weren't a few more sets of armor to get or something.

Yeah I'd definitely like melee to take off something like a third of your energy as opposed to all of it.
 
Also the evade would feel a lot better if it wasn't just in four directions. If only one thing were to change I hope it's getting some omnidirectional evading.

I laaaaaaaaved it!! Totally preordering this mutha.

Yes, the demo is awesome and Bayonetta was awesome as well. I highly recommend anyone who hasn't played Bayonetta yet go pick it up and do so while you wait for Vanquish.

Really liked the demo. It was also kinda hard, with that boss. Man, that thing wasn't messin' around.

I'm not feeling the art style.

i love the demo i need this game in my life 

I really like it. It's ridiculous. Only problem is I died at the second stage of the boss and checkpointed back at the first. Kinda minor but I thought it was annoying.

I loved it, I just hope the main boosting mechanic stays fun throughout the entire game. Doubly so given that the story and characters feel pretty uninteresting, IMO. 
 
Although, Sam seems like a bad ass.

" I loved it, I just hope the main boosting mechanic stays fun throughout the entire game. Doubly so given that the story and characters feel pretty uninteresting, IMO.   Although, Sam seems like a bad ass. "

I think it's pretty awesome.
 
The exaggerated sliding and speed is awesome to look at!

Loved the demo a ton, i played through it 3 times in a row which is something I don't tend to do with demos at all. I cannot wait for this game It has jumped to my most wanted game of the year.
 
I also want to see him boost vertically up a wall onto the ceiling whist smoking and  getting a headshot on a russian robot which is also smoking  in slo-mo. 
 
I was standing in cover and he threw out the cigarette like some kind of heat decoy, does anyone know if thats what it's purpose is?

I don't think I've heard Steve Blum in anything great other than when he did Scott Mitchell in G.R.A.W. which he did an awesome job on that. OH! And the game is fun. I liked how the boss didn't dissapoint. This gam though, feels like one that will fail in the story aspect. Which, I think overall for a game like this, needs a good one to make it as good as it can be. You mix this gameplay, with a good story and you have a good enough game.

I was pleasantly surprised.

It was great fun, probably get it when it's cheap and there isn't a steady flow of quality games coming out.

I don't usually play shooters but I had a blast with this.  Not as fast paced as I was expecting, but I might be playing it wrong.

Finally got around to playing this demo and absolutely loved it can't wait for this game to come out. Also need to go back and check out Bayonetta since i never got around to getting that game even through i remember playing it and loving it.

" I want some sort of customization on the armor, or at least the ability to upgrade it's functionality so it can take more damage/boost longer and the like.  With all of the unlockable content that Bayonetta had, I'd actually be amazed if there weren't a few more sets of armor to get or something. "

" A jump button or vault button would be nice. Because there were times when I was standing beside cover I wanted to get over. And I would have to take cover and then more over top of the cover. "

Yes, it was excellent, and I'm looking forward to seeing more.
Bayonetta crossed with Bangai-O.

" Loved the demo a ton, i played through it 3 times in a row which is something I don't tend to do with demos at all. I cannot wait for this game It has jumped to my most wanted game of the year. I also want to see him boost vertically up a wall onto the ceiling whist smoking and  getting a headshot on a russian robot which is also smoking  in slo-mo.  I was standing in cover and he threw out the cigarette like some kind of heat decoy, does anyone know if thats what it's purpose is? "

I was not interested in this game at all - it looked beyond generic, but after playing it? I'm pre-ordering. I loved it.
 
What it needs is a Survival mode - or what you might call Horde Mode these days - infinite enemies just to see how long you can last - in fact, that's all I want from this game.

I loved loved loved loved loved loved loved loved it.

The voice acting was so god-awful I couldn't even get through the tutorial. Turned it off.

Felt average to me... didn't feel like it was anything new or anything all that noteworthy.  I was disappointed. 

I really really liked it. I got a weird Lost Planet meets Mass Effect vibe from the gameplay which is pretty awesome, but DAAAAMN does that game look amazing. The visuals are so nice and sleek its pretty crazy. I also love the cool future tech stuff that is in the game, for instance, how you are holding the same device but switching guns just makes the actual gun like transform. Not to mention how cool the sliding and slow motion stuff is. I really really liked what I saw, and am now excited for a game I never heard of before a few days ago.

Demo was kind of fun, nothing out of the ordinary. Pretty much feels like your typical modern day 3rd Person cover based shooter.

" I thought it was cool, but I don't know what the smoking does. "

Stylish, however the graphics sort of is jaggish and it looks blurry. I'm not used to this, too bad there isn't a pc demo if they are even going to make the game or not. I enjoy this type of gameplay though, lots of fast action stylish shooting, I like the game. I don't think the gameplay is all the deep though.

" I really liked the demo too.  Fast and fun with some great Japanese weirdness tossed in.  Wanna play the full game now for sure.  Anyone know if there's any form of co-op? "

Steve Blum was cemented for me because of him being Guyver 3. They need to sort out some of these names, I believe that the boss was originally called Argos which was changed but Robert Burns? Every time I notice that being his name I get pulled out of the game, but the smoking is badass, very Solid Snake/Don Draper.

" I really really liked it. I got a weird Lost Planet meets Mass Effect vibe from the gameplay which is pretty awesome, but DAAAAMN does that game look amazing. The visuals are so nice and sleek its pretty crazy. I also love the cool future tech stuff that is in the game, for instance, how you are holding the same device but switching guns just makes the actual gun like transform. Not to mention how cool the sliding and slow motion stuff is. I really really liked what I saw, and am now excited for a game I never heard of before a few days ago. "

" @paradox121 said:      it does seem a bit odd that when you drain it down and everything slows down you cant skid away just slowly jog to cover. "  Are you sure? I am almost certain I skidded to cover the one time I was in slow motion. Maybe it was a manually triggered slow motion. "

For some reason it didn't really do anything for me. Not sure why, just wasn't a fan of it really.

" For some reason it didn't really do anything for me. Not sure why, just wasn't a fan of it really. "

I dug it. I just wish it had a PC port so I could get it during a Steam sale. I'm so spoiled now.

"

I don't think I've heard Steve Blum in anything great other than when he did Scott Mitchell in G.R.A.W. which he did an awesome job on that. OH! And the game is fun. I liked how the boss didn't dissapoint. This gam though, feels like one that will fail in the story aspect. Which, I think overall for a game like this, needs a good one to make it as good as it can be. You mix this gameplay, with a good story and you have a good enough game.

"

I didn't like it on my first play through, but after my second I loved it. 
Flip kicking a robot while also shooting at another one in slowmo made my day.

I haven't played the demo yet (too busy owning in Bad Company 2) but the GB Quick Look seemed like it's a fun game.