Fun at first, sucks later.
Well, it is very addictive at first (not as much as GTA though...)
For one, the 3D engine is horrible. Really horrible. Slow even on a P2-350, and doesn't even look good enough to justify it. The controls are really, REALLY bad and even the pedestrians' screams aren't enough to satisfy the unwary buyer.
The Bottom Line
Leave it alone, and get it over with.