A review from a truly disheartened CoD fan
Yes the graphics, menus, sound effects, and just about everything else are identical to Modern Warfare 2. I can forgive the game to a certain extent for the recycling, but what I cannot accept is how bad the map design, respawns, and matchmaking system is. The maps are smaller than ever, circular mazes of narrow alleys littered with random junk and enemies respawning behind you. 80% of your deaths will be someone who respawned and shot you in your back. Apparently Infinity Ward learned nothing from the failure of the matchmaking system in Modern Warfare 2 as the exact same system is back in full force, and that once again means you cannot kick the many hackers, cheaters, racists, and flamers you will inevitably meet, this of course not counting the fact that you will often experience lag in games where you will shoot half your clip only to see in the killcam that you were standing like an idiot and only managing to fire off 2 bullets.
The inclusion of dedicated servers would have fixed 1/2 the issues of what is an "okay" game, but sadly it is not to be. Avoid the PC version, it's not worth the heart ache.