I've not had enough time to play it, only about 1 hour last night.
First impressions are not great... I can't believe they've not fixed the many multiplayer connection issues since the beta and actually seem to have new ones like the lost cd key every 4-5 games! The xfire flickering was terrible until I forced the bioshock profile in RadeonPro and without DX11 support for things like hardware tessellation as well as the terrible optimisation for ATI cards it just seems like a rushed/sloppy job by Crytek.
For a company who expects to resell their engine to other developers using Crysis 2 as a AAA showcase I'm very unimpressed.
Graphics-wise the multiplayer graphics are obviously nerfed down a bit but I think they look good in both MP and SP although bloom and filters are way over done. Some of the textures are pretty poor quality, I can tell those have been reduced to work on consoles, modern 1gb+ gfx cards can handle way, way bigger textures. There's also very little bump-mapping and depth filters going on with them, too flat looking. What really looks terrible is the foliage! That's always been a strong point in the old engines but on the MP maps and the start of the first level they suck, literally a square box with a basic semi-transparent texture. Right out of games form 2-5 years ago!
With everything on extreme in plays well, vsync on and it sits at 60fps easily with some drops to 40-ish.
I'll not comment not the story yet but it's disappointing that the world is not so open as the rpevious games. Multiplayer looks fun for a blast though so it'll probably stay on my system for a while.