Great concept, but lacking in a few areas.
The action sequences are obviously the best part, followed by sniper, interogation, and the hacking mini-games. However the driving portion of the game is UBER lame!
If they would have developed this game with the guys from the GTA series this would be an incredible game. The driving would be alot more interesting, instead of a way to kill time.
The story is excelent, and keeps you wanting more (like all 24 experiances should) While the voice acting could be better (opening scene with Jack had none of the feel Kiefer gives in a live-acting situation), and the real-time element could also be investgated further.... taking over a transport ship would never take Jack 50 mintues in the show, so why should the opening mission take up 50 mintues of story?
Controls are a lil messy at first, but make sense once you get into the game.
Overall, I'm definatly surprised with the game. Excelent graphics, great story (Something lacking from todays games), and awesome action sequences... the filler is where the game falls apart though...