Playing through RE5 with my gf was the best game experience I've ever had.
I might be a little bias but I felt the coop really worked well.
Yeah same, I played through with one of my friends and we had sooooo much fun with it. The best bits were usually the parts where you're yelling at each other in really tense moments or the moments where you really felt like you were IN something together. I tried to play it single player once, but it was just no way near as fun.
He also bitched about poor gameplay mechanics, such as not being able to back up and shoot your gun at the same time.
Me and my friend just didn't get that. We really couldn't get why people were bitching on about that... it felt fine as it was. I'd probably not have bothered if they put in moving while aiming, it would have ruined the feel of the game (you really felt you had to time when to attack)