Although SWAT 4 brings in new ideas, it's not as refined as it should have been.
Lets talk about the good, shall we?
SWAT 4's gameplay is unique from any other. If you've played RAINBOW 6, this is quite familiar. You lead a highly trained group of SWAT Units that respond to what you command them to do. However, when you do make contact with the enemy, you have to yell and subdue them, before you can shoot them. If they point a gun or fight back, that is when you are allowed to fire. This adds an intriguing perspective to FPS shooters.
SWAT 4's difficulty is insane. Passing levels will really work your patience. Why is that? One little mistake, may have your INTIRE squad wiped out. That maybe the worst of all. One thing I do not like, is that your team, never pursues, or protects you when you are busy. This glitch feels like you're on your own sometimes, facing down 20 terrorists with AK's and here you are using Pepper Spray. Glitches will also test your patience.
Graphics: The graphics are quite nice. However, the detail is something to pay attention. You can spot cock roathes in abondened buildings, cigarette smoke, even count the number of flash bangs your team has.
Sound: Music is something I hate in SWAT 4. The music, honestly sounds like a horror movie. I hate that. Also, I'm not entirely pleased with some of the voice commands and gun sounds, but other than that, it's fine.
The Bottem Line: SWAT 4 has been a long time in the making, and it should have been more polished with more modes and such. It does bog down on the overall polish of the game, however, it does not subtract from the fun. SWAT 4 sounds and feels like a great shooter.