They've fixed a lot of the bug issues which annoyed people on its release...although they have now added 99 elite ranks (kinda takes the wind out of your sails when you finally achieve elite status only to find you've just started, really) and another 80 A.C.E.S with no real point to them...
Aside from that, I find it a very enjoyable game as the AI isn't too hard to combat (although it certainly isn't easy) and it isn't a game where you find yourself yelling "bull****! I shot him in the face three times!" at the screen all that often.
I've only played Terrorist Hunt online and apart from the occasional 12 year old brat who whines about how they don't like the map or they don't like the time limit, you get some good team mates who work with you and don't mess about.
It's a lot more intuitive than the first game and whilst COD4 fans complain that RSV stole their levelling up system, I think it's a good addition - plus you level up even when you're dead
I'd recommend it to anyone but that's just coz I get very biased about the games I like :lol: