Just watched the "launch trailer" on GameTrailers.com. This looks really nice. Very simple, but with an atmosphere of it's own. The grappling mechanic seems to be really polished and especially the rolling around looked like a nice touch. Frankly, though, it looks like it would be rather boring playing it on your own. But, the coop certainly looks interesting
I will likely never own an Xbox 360, but if I did and had a buddy to play this with me, I guess there would be $5 well spent
Apart from watching the trailer I also read some comments on it at GameTrailers. I guess you shouldn't let these put you off, a lot seemed really, well, stupid in a way. Time and time again saying that this would be a PixelJunk Eden knock-off.. Well, don't take it too seriously
Thanks for your comments. I didn't take the comments on gametrailers.com seriously, because most of them came from people with usernames suck as "WoveMyWii" and "PS3Loverboy". Just console wars at their most basic, the sad thing is I'd do Bennu for all the consoles if I could.
Also, I saw some videos for Pixeljunk Eden and the only thing in common is the grappling mechanic which has been around since Bionic Commando, etc. You're also right about co-op being more fun than single-player, it's where the game is the most enjoyable, although I also like single-player mode.