Just finished two rounds. Honestly, I'm not that impressed with it as it was literally a carbon copy of Call of Duty's multiplayer with better graphics and some nanosuit abilities taking the place of perks. Hell, it even has a damn kill cam.
I'm also upset that you can't seem to adjust the graphical settings in-depth so I have no idea what settings make up what I'm seeing. From what I understand, hardcore seems like it's the best, but I'm not quite sure we're looking at the very best the engine is able to output especially since you can't look at all the individual graphical settings (at least not in-game from what I could tell).
I was running 1920x1080 with the 'hardcore' graphics setting and I was getting 75fps. Sure, it looks nice, but I'm a little skeptical with the frame rate being so high (this is a Crysis game after all :P ) so I'm wondering if we're seeing the engine's full graphical prowess or do we just have to wait till the full game comes out to see the hardware explode trying to render each frame? I mean it was a pretty small download (1.7gigs) as many retail games nowadays need 10 gigs so I'm assuming we'll be seeing more impressive graphics come launch day.
On a final note.... I could tolerate Killzone 2's pseudo 3D effect because it only took place during the loading screen and you had to tilt the controller around to do it. The menu pseudo 3D effect for Crysis 2's menu system is HORRIBLE as it tilts the menu away from where your mouse pointer is and it's making me sick as I try to focus on navigating the menus. I think that the only workaround for it is to use the arrow keys though.
Frankly, to me multiplayer feels like a letdown so I'm a bit curious to see how the singleplayer works.