Summary: I had trouble installing and playing it in Window 7 for few days. After researching online and download the patch 1.1 for Crysis & Crysis Warhead, the game seems to be stable and I was able to finish to the end. Good game, I love it.
Summary: Won't play last level of Crysis (they overcomplicated scenes, and wrote it for inVidia GPU, so it overwhelmed my ATI HD4850), but Crysis Warhead played fine. Agree with others that Warhead was actually a better game (included). Crysis 2 - Limited Edition is comming out in a few days. I sure hope they fix the online gaming "lag" problems we experienced in the online demo (shoot an opponent a dozen head shots and die from a couple hits a half-second later).
Summary: I absolutely love this game. if you have a high end graphics card, this is the cream of the crop in graphics, and virtual experience. In Crysis, The Relic stage has a bug that caused me about an extra 5 hours of having to replay the stage to complete. Also, the final Reckoning stage on the Aircraft carrier locks up, no matter what you set the graphics at. Would have been a 5-star review, if these bugs weren't so annoying.