I bought one for use on my D300 from Camerabox .co.uk . I couldnt get a sharp image when using autofocus. I tried all apertures I could with the available ( sun) light and every distance from a few feet away to about 30 metres.
I sent it back to Camerabox.co.uk , they said ( after 2 weeks) there was no fault with it ( well they would wouldnt they to save refunding £30 in postage)
So, if that was an example of how this lens performs, i wouldnt touch it.
Apparently, there are minimum focus distance issues with this lens on the D300 ( and probably others) but when i rang Nikon about the af focus issues i was having, they suspected the lens was faulty and i was being fobbed off by the retailer. ( Camerabox.co.uk)
I previously had an 80-200 AF-S and now have a 70-200 vr. Both are ( were) pin sharp at all distances.
Others state the lens is superb, if you do decide to get one, dont get it from Camerabox.co.uk they may sell you my allegedly faulty one.
Allan