Incredible! Few bugs, uses a lot of GPU.
I love the weapon attachments and the nano suit, you can approach any situation however you like; get a car, drive into everyone, then blow it up, or even sneak in undetected, grab enemies and throw them off cliffs.
The difficulty of the levels steadily increases as you get use to the game, making the game the perfect difficulty the whole way through. I love the storyline, it is one of the most creative plots I've seen so far in a FPS, and their realism grabs you and brings you into the game.
Crytek has really outdone themselves with the environment, one of the coolest things I found in the game is that you can shoot down a tree (it actually breaks right where you shot it), you can grab the fallen tree, and use it as camouflage.
I tried the multiplayer, and it's a bit beyond my computer's abilities, but it's pretty fun, although Crysis doesn't stand out too well in that area, other than the fact everyone still gets to play with their nanosuits :P.
I found that there were still a few bugs in the game, although I still haven't played a game without bugs. For some missions, when I completed the objective, it hadn't told me what to do next, so I had to restart that certain area.
I read a few player reviews that hated the AI, but I loved it! They actually use what they see and hear to their advantage, actually making it seem like actual intelligence. You can throw something at a wall behind them, they'll hear it and turn, then you can jump behind them, and toss them twenty feet.
I also loved the diverse assortment of aliens, there were several different types instead of just one type of alien, and I ended up finding different ways to kill all of them! If they're in the ship, use the shotgun, if they're the big guys, Gauz, if they're the little guys, grab them and throw them.
One of the final things that made me go 'wow' is the inside of the alien ship. When zero gravity came, and how easily the camera rotated around as you were flying, made you actually feel like you were there, you can shoot the crystals, and hear their peaceful ringing as they drift around.
The music and sounds are perfect, fitting into the game well, and the ending keeps you waiting for more.
I highly recommend this game, there a few flaws, but this game is well worth it! Imo, this is the best PC game from 2007.