being in the UK I only got this game on friday....
but by jove it's a good'un. It hasn't disappointed at all, and that's a hard task when a game has had as much hype as gears! Gameplay is really fun, more so than i thought it would be infact and the graphics are just incredible... there have been a number of moments where i've just stopped after a firefight and walked around in awe looking at the environments, which are indeed far more varied than we were led to believe!
The only negative points are your partners AI, I don't know what it's like on casual since I have only been playing on hardcore, but It can get frustrating when your team mates do something stupid and get mown down then you die trying to save their sorry arses. This became less bad when I realised that you can leave them bleeding out for a pretty long time which gives you more time to try and kill the enemies in question before attempting a rescue. It was also more or less totally solved when playing co-op with a friend and that is where this game really shines in my opinion. I'm also not so keen on the perfect reload giving you a damage boost - I really like the mechanism and the idea, I just wish it was only associated to a quicker reload because it seems a bit stupid and random to have a more powerful gun on account of reloading it quicker.... maybe I'm just a cynical old man.
Overall though, best gaming experience I have had in a long time, especially in co-op and multiplayer... the review scroes were well deserved.