Excerpt: I read other reviews and wasn't sure if this lens would be a good investment, but after using it during an evening event, I was very happy that I got this lens. The f2.8 capability resulting in photos I would have not been able to get had I used the "kit" lens. I used it with my Canon 70D and 580EX II flash and was extremely happy with the focusing speed and overall image quality, even when the subject was 20 to 30 feet away.
Pros: Consistent Output, Durable, Fast / accurate auto-focus, Nice Bokeh, Strong Construction
Excerpt: I have bought about 15 Canon lenses and this is the best. It costs the most but is worth it. The lens is very sharp and not too heavy. The 2.8 f stop along with the stabilizer makes it very useful in everyday usage. I am very pleased with the purchase.