Graphics: 4.75/5 Honestly, amazing. They didn't look too great in the demo for whatever reason, but the in-game graphics and the cutscenes are some of the best on the 360. The most unbelievable part is that there is virtually no lag offline. There are a few hiccups, but it's quite rare. Online though is a bit of a different story. While the game usually runs well, certain rooms and certain maps have some lag issues.
Sound: 4.5/5 Almost up to par with Call of Duty 4, but not quite. The vehicles and explosions sound great, even better than Bad Company.
Control: 4.75/5 The game controls arcade-like in a way, and the helicopters and vehicles for the most part control very well. The on-foot controls may take a bit of time because certain buttons are different than that of Call of Duty 4, but you should get it.
Fun: 4.5/5 The single player to me is probably the best part. The multiplayer is okay, but there are some seriously forgettable maps, not many people play the game online, and there are lag problems. FrontLines should definitely be rented just for the single player experience. And for you achievement whores, the game boasts some moderately easy achievements.