I played this today at a mates house and here is what my opinion is on it from doing so. I will compare it to COD just because most people play/have played it and know its good and bad, and that is the only reason I am comparing it to that.
Servers: They seemed to work well, some of the time. Most of the time I had a hard time getting into games, or it taking a while to get into a game.
Hit detection: WAY better than COD for sure, no problems in this area.
Map design: I like the maps better, but not really. What I mean is most of the games I just came across loads of snipers sitting way up on rocks and such and it was very frustrating not being able to move about the map hardly at all without getting killed quickly. The way the maps are made allows this, and basically promotes camping hardcore.
Killstreaks: I like how they work in this game with the points system, but not sure if I like it better than how COD works theirs simply because there isn't really much skill involved in getting killstreaks in this game.
Controls: The controls are a little sluggish, not really clunky, but just sluggish.
The perk system: I like how they are setup much better than COD's.
And again on the map design mixed with the spawns. The map designs combined with the spawns just equal awful to me. The spawns are horrible, and they don't flip hardly at all which just makes for some very easy spawn killing, which really pisses me off. Most of the time I found both teams just having fun fights from set locations on each side and that lasted the entire round. Will I buy the game? Hell no. Would I mind getting it from gamefly to play the single player, yes. Again, these are just my opinions so nobody start a flamewar please. You can rank up to level 5 on multiplayer if you rent it, to play online you have to buy it new. I like this compared to some new games where you have to buy it new to even try the multiplayer. So, rent it, play some online and that way you don't waste money.