The single player campaign is excellent, although I stopped playing as soon as you had to command and control several groups at the same time - I'd have rather preferred to continue following orders. Nevertheless, it was really exciting at times.
Graphics are nice, nothing spectacular, but a good standard. Trees and shrubs look pretty bad, as in every game so far. The levels are vast, easily the largest I ever saw.
Never tried multiplayer, but I heard (and can imagine) deathmatch to be incredibly boring and cumbersome (the game is ultrarealistic, far more so than CS). Cooperative multiplayer could be something the game could excel at, but I don't know if they use that chance.