9 out of 10 points and recommendedLight, sharp. good autofocus, smooth zoom and focus rings.no VR, Variable f-stop, not weather sealed, significant distortion at 18mm, not a wide as some alternatives.
I have compared this lens to the 17-35 2.8 and the 16-35 f4 VR myself on a D800. IMHO, this new lens is better than either (at the same focal lengths) - and much cheaper and lighter. At f8, all of these are fairly similar, but at f4, the 18-35 has considerable sharper corners than the 16-35, and a bit sharper than the 17-35.reviewed April 13th, 2013 (purchased for $750)
Used it as a primary lens on a trip to Death valley. Results were very good. Quite a bit better than the 24-85G at 24mm.
This lens is weakest at 35mm, but still pretty good.
For hiking, it is and ideal wide angle when weight and size area consideration.