The best kind of online experience.
So you might be asking yourself what any of this has to do with CoD4. Well if you are asking that question then you have obviously never played CoD4 and must, therefore, have been living under a rock for some absurd amount of time. The game is so immersive and addicting that you WANT to be the best all the time and have the greatest record, and the highest kill streak and all of that other Pokemon-esque "I gotta catch em all" bullcrap. So I entered into the game thinking to myself "Yay, I will go in, get a record of 30-15 like I do in Counter Strike Source and other online shooters, and then march triumphantly back out again!" Needless to say that it didnt happen, and I ended up going 1-11 . I played the next several games and improved only fractionally. After some time, I started getting better. I now realize that if I had just stopped taking the game seriously I would have had more fun.
How about I actually REVIEW parts of the game now. Graphically the game is stunning beyond reason, with well detailed environments and weapons, both of which vary a great deal. The sound work is similarly amazing, with great weapon sounds, good voicework when calling out UAV and Air Support, and some overall good sound effects (like grenade explosions, for instance).
As a matter of fact, there really arent many complaints that I CAN make against this game. Hang on let me try a little harder. Oh yeah, I forgot, the lobby system sucks. Okay, so in the Xbox 360 version, when you join a game, all you can do is choose the game type (Deathmatch, TDM, Zones, etc) but you cant choose what game you want to enter. Therefore it's like a random lottery. Subsequently, you will probably end up getting into a map that you hate more often than not, unless you love every map, which I find to be almost impossible. It wouldnt be so bad, except if you quit out of a game, and try to roll again in the same game type, there is an absolutely excellent chance you will end up in the same ****ing game you left. This gets aggravating, believe me, since sometimes you end up in a game where the teams are 12 vs. 4, which really isnt very much fun...
All in all, the lobby system is a small complaint. It's a tiny dot on the otherwise perfectly polished exterior of a great online game. The single player? Yeah, havent even tried that yet, so I cant help you there, but if it's anything like the online, then you won't have a reason not to love it...unless of course you can't choose which level you go to, and you end up going to the same annoying level 4 times in a row...because that might get on your nerves.