Very good game for me. Single and multiplayer. I can not aim the guns worth a damn and get killed a lot in multi, but really love the new maps and action. The molotov cocktail is a hoot.
I am just beginning it, but think it is close to being as good as COD4. It offers more, but that produces lag and other problems. I did not find it a campers paradise in free for all, but that can change. The guns recoil a good bit and are different to aim than COD4, so will know more in a while. You can modify your weapon a lot after getting some points in by playing. A muzzle brake would help a lot for me.
Instead of trash blowing in the wind, they have a bunch of flies. I could do without that and the lag it surely causes. The stun, flash grenades and clays are just as annoying and useless as COD4. Too many aircraft flying all the time and making you duck into buildings. Would like to find a server that does not have those distractions. Private only I would guess.