I have this camera for a while and I'm very happy with my decision. I'm really impressed by the build quality and the AF/metering performance. Also, people usually complain about noise in this camera. I, however, really like the high ISO noise. It is grainy, especially in the shadow areas, but it has a high-speed-film appeal to it. I personally don't mind the noise so much but maybe it's just me.
Note that this D200 is now a two-generation-old camera (the D300s has already been released). No doubt the new D300 would be better, but this D200 is much cheaper.