Having been a fan of the F1 2010 game - despite its niggling problems, I was delighted that F1 2011 had finally arrived.
Without a doubt the biggest addition to the game - and the main reason I was waiting with such anticipation for this game - was the much talked about Co-Op championship mode. My brother and I spent many hours playing the TOCA 2 touring car game simply because it was the best 2 player team championship we could find and we were massively excited by this feature.
BE WARNED. There is a serious bug in the Co-Op championship which renders the AI drivers pretty much useless. We played the first round of the season with AI on Legend (top setting) and all assists off etc with no problems - over 100% race distance we were knocking on the door of the top 10 in Lotus-Renaults, pretty much where you'd expect to be. But at round 2 in Malaysia the AI were suddenly 8-10 seconds off our pace.
The Codemasters forums are full of posts from people confirming that same problem - it looks like we were lucky that we even got through Australia before the AI decided to slow right down.
Career mode, as far as I can see, is fine - but if you are considering buying this for the Co-Op Championship aspect please please please wait until Codemasters announce a patch has been released to fix the issue - at the moment it kills the game. If they fix this problem the game will get 5 stars, but until then I feel like I've only got half what I paid for hence 3 stars (would have been 2.5 if that was possible, but since it's not 2 seemed too mean....)