I’m very happy with this combination. My Nikon D40 is a nice, inexpensive body for this better-than-just-nice 18-200mm VR Nikkor lens.
The lens would probably feel more at home on a D200 body, but I don’t have trouble with all that weight on the front of my diminutive D40 — I just keep a good grip on the lens.
I don’t yet have an opinion to share about the optical quality of the lens.