The console version of Crysis doesn't look quite as good as its PC counterpart (and that's to be expected). It doesn't add any new campaign content, and it doesn't include the multiplayer support packaged with the original. With that said, it's a great buy for console owners. Even without the badass Nanosuit abilities the gunplay itself entertains. And considering how many different methods you can pursue to complete your mission, no two players will tackle Crysis in the same way.
If you stay patient with occasional stealth hiccups and the brutal frequency of death, Crysis will be well-worth your time, money, and the dangers of experimental Nanosuits.