Light weight and small. A sharp little lens and an all around good wide angle option for a cropped sensor Canon camera. IS rating: 9, the IS on this lens works very well. The only grip I have is the fly-by-wire focus. Typical of the STM lenses, the lens must be powered up in order to use the focusing ring. The f/4.5 min aperture is only at 10mm, once you zoom to 11mm the min aperture changes to f/5. On a tripod the min aperture is not an issue since i'm usually at f/8 anyway. Off tripod, the IS can really helps. I had this lens on my 70D on top of a 12 foot painter's pole. With the IS on I was able to shoot at shutter speed as low as 1/3 of a second and still got very clean pictures.