Only tried Metro for a few games so far. The map itself seems a bit disorientating in some places but that just means I need to play the game more.
Graphics seem decent (Don't know what settings they're on) but the game looks good. FPS seems good for the graphics, no slowdowns. Hit-reg seems to be quite good. I also like the sounds, well the explosions anyway. On my 5.1 surround sound setup the explosions give off a nice loud boom.
Only bug that has really caught my attention was when I tried crouching for the first time and ended up below the ground, I then stood up and tried walking around to find that I was bouncing up and down slightly which is quite irritating when you're trying to aim at someone. Probably been mentioned by someone else before.
Don't know if I'll buy the game or not yet, another hour or two on the Beta and the return of some old maps will probably sway me.