You can always check youtube. Some fortunate people always get games before the launch and post gameplay videos on the web. I already saw some posted on Ali-A channel. The footage is not made from his gameplay but from a friend, still you can see. He also have some videos where he analize the game and such.
Lots of 1 star reviews, mostly from hardcore and proffesional ( I know that's not right but that's how he spelt it ) online players and people who hadn't received it on release day. Seemingly people with an axe to grind. The 4 and 5 star reviews seem to be written by people who had actually played the game. I think that I'll wait until the price comes down a bit.