9 out of 10 points and recommendedwide range, decently quick, USM, non-rotating front element, inexpensive, light and compactnot weather sealed, IQ is not the absolute best, lacks IS
I simply do not understand all the negative reviews. This is a wonderful lens, and possibly the best value of any lens Canon has ever made.reviewed February 9th, 2016
Or most practical purposes the IQ is indistinguishable from 'L' zooms except at huge magnifications or zoomed in to 1:1 on the computer, and even then the differences are small.
It is fine on APS-C cameras as well as full frame. I admit that 28mm is not at all wide on APS-C but for many purposes 28-105 is a useful range.