I'm not qualified to review this game. I couldn't play through this whole mess. But I'm an arrogant bitch who has to give his two cents to everything, so here they are:
This game/tech demo wants to be everything but ends up being nothing at all. It wants to be a fun single-player shooter but it also wants to be tactical, it wants to be realistic and it wants to be sci-fi, it wants to look free roaming but it's pretty linear.
It already starts out mediocre. You are some generic guy in a generic supersuit with other generic guys in blablabla. The whole beginning looks like a gay latex fetish porn. You got all your clichés right there: The trash talking maniac, the insult slinging squad leader... I don't care about any of them and that was the first disappointing moment of the game. Then you land on that island and start to raid one camp after the other until aliens start to pop up everywhere all surrounded by cheesy and just plain bad dialogue and then I had to stop. It felt so sloppy.
There's already been enough talk about the technical aspects of Crysis. It looks nice. Like that hot bitch in school. She's stunningly hot but dumbness is so unsexy.