If you're like me, you can't find the Nikon VR lens anywhere unless it's being marked up 50-100% by businesses taking advantage of the shortage (supply & demand, right?).
After 2 months I got tired of waiting for the VR lens and bought this 18-200mm Tamron instead (vacation just days away). I have taken many dozens of walk around photos with this lens attached to my D200 getting a feel for it's capabilities. As a photo hobbyist rather than a real photographer, I produced some very acceptable results (and a few stinkers too).
At higher magnifications it is more susceptible to camera shake than say my 70-300 Sigma lens, and I believe that may be due to the Tamron being a "slower lens" requiring slower shutter speeds to get the same amount of light through it (at high zoom). I can see where the Nikon VR lens would win hands down here since it's faster AND has vibration reduction, BUT - Do not discount this lens as I have managed to, with patience & a steady hand, or a tripod in some cases, produced great results.
The Tamron is not all that noisy, and the auto focus is pretty quick. It does fail to autofocus in certain shady conditions so if you do most of your shooting in moderately dark shade you might run into trouble. It seems to do better with "contrasty" shade rather than dim grayish backgrounds where it really hunts for focus (mine anyway).
I can't seem to get consistent results with the Tamron using a flash indoors. About half of my flash photos are slightly out of focus despite my best efforts at hand holding the camera still. The clear pix are great however. I have yet to take any indoor pix using my SB-600 flash so all of my indoor shots to date are using the pop-up flash. That probably has no bearing on the fuzzy shots I've produced but I thought to mention it.
Overall I recommend this lens as a suitable outdoor walkaround lens. Nearly all of my outdoor shots are nicely sharp with great color and contrast. It's operation is smooth and feels good. For indoor shooting you MAY want to carry a faster lens like a fast, fixed (prime), or even the 18-70mm "kit" Nikon zoom which does significantly better indoors.