Got this lens last week and am very pleased. I had previously tried the Tamron 150-600 mm and returned it on account of it being soft at maximum zoom. This Nikon is sharp at 500 mm. Only drawback for now is its size but seems like it is worth its weight! The focusing is accurate. The VR has a "Sport Mode" which is recommended for panning. Here is an example of a panned shot at 500mm f8 mounted on a D800. I did not test it at the max aperture since I typically use f8 for my aviation photography. I think I'm keeping this one.