Very sharp and let`s you work in 3 dimensions or isolate features - much cleaner compared to average flatimaging telezoomacro plastickit.
Very nice and substantial build quality without beeing overly bulky and heavy.
Fast AF - at least on D600. Purposeful noisy, not silent. I carry this and a 50mm, 1.4 G. Both let you work with 25-100 ASA at most times.