I have recently purchased this lens a few days ago. I have to say I am very impressed with the sharpness and build quality. The only thing that is bothering me is the slow and stuttery auto-focus. I manually focus most everything anyway so no biggie.
The lens is quite think and heavy, witch is to be expected for a full frame lens that has a huge aperture.
The focus ring is very smooth, no catching or screeching.
The glass is very clean and sharp, especially with the nano crystal coat.
Photo #1 Normal Image
Photo #2 (Cropped)
This is the sharpest nikkor I own to date. It does more than just macro photography, this lens is good for much more.
Overall 5/5 *s