Good, but don't expect another Perfect Dark.
The controls of the game are somewhat off, they are nowhere near as good as the controls for the original game. The graphics are really nice and the part where this game really shines (literally). Soundwise the game is pretty disappointing, the weapon sounds pack no punch even if you crank up the volume. And don't even get me started on the "story".
Perfect Dark Zero is an entertaining game for at long as it lasts, which is not very long I'm afraid. If you want a fast-paced shooter with a glossy surface, look no further. If you are expecting another Perfect Dark, on the other hand, you will be sorely dissapointed.