Excerpt: I have written a review before but I just wanted to chime in again because I've had the lens almost 2 years now. I still love it! THE ONLY thing I don't like is that when I upgrade to FF I wont be able to use it. I have found it's sweet spot (sharpest point) for me is with an aprature of f 3.2 although I have got some great shots at 2.8 as well. I'll share couple photos. The lens creep doesn't bother me as it's not super long and therefor doesn't drop too hard.
Pros: Consistent Output, Durable, Easily Interchangeable, Fast / accurate auto-focus
Excerpt: I've had this lens for about three weeks. I'm using it on a Canon 70D camera body. I have had the Sigma 17-50mm f/2.8 lens for nearly a year and I recently replaced it with this lens because the reviews that I read say that the image quality is higher on the Canon lens than the Sigma. I'd have to agree that this lens is better than the Sigma, although not by a lot. It is sharper on the edges and corners of the frame, but about the same in the frame center.
Excerpt: being just a hobbiest I am going from a standard lens that was included with my Canon RebelT3i to this lens. I wanted to upgrade my gear w/o maxing my CC. I was surprised by the size and weight but still easy to work with. I was looking for better sharpness and DOF for smaller space shooting areas--this lens is perfect!!
Excerpt: I bought this for a wedding. I didn't want to have to change lens and it did great for what I needed. I am happy with it for the versatility. It did not wow me by any means like some of the prime 50mm lens I have shot but I needed something so that I would not miss the shot and this one was pretty much a guarantee to cover the focal range I needed.
Pros: Durable, Fast / accurate auto-focus, Nice Bokeh, Rugged, Strong Construction