Just platinumned this, I really enjoyed the mechanics in this shooter. Delta difficulty is where the game shines, it's really tense at times due to the number of soldiers sent after you. In essence, delta teaches you how to play the game, so the easier difficulties become a cakewalk after. After playing the game fully, I can now go through this game knowing a surefire way of how to approach each encounter and can explore alternate strategies in alternate play-throughs.
Truth be told though, I did play most of crysis on my gaming pc, around when it came out, but when I got to the ascension level some alien got stuck in the background and I could'nt proceed to land the vtol. So I let that be and never went back.
Looking at my playthrough on the PS3, I must say I've enjoyed it much more than when I played on the PC back then, perhaps my style of play wasn't all that hot back then, maybe I've grown as a player having played so many games on the highest difficulties recently, it could also be that I prefer the controller over KB and M.
Knowing that you can save everytime on the pc is indeed a worthwhile option, but it kinda takes some of the fun out of the game if you save too often. I do prefer the checkpoint system here since you have to toughen out a good stretch of the game especially on the higher difficulties, it makes the game more fun and enhances the challenge somewhat.
Looking at this port, I will say it's a decent port, this is the same crysis we got on pc minus ascension, graphics are good on the PS3 and the framerate is much better than what I got on my 8800 GTX back then, even though I played at 1920 * 1200. I recommend this game to everyone who has not played and who maybe a platinum hunter like myself, lol, it's only $20 on psn anyway without the nasty drm to boot.
So, I'm off to amazon to get the limited edition of crysis 2. All I got to say to Crytek, get the resolution to a full 1280 * 720 on consoles for crysis 3 and things should be bliss.