Whenever changing situations quickly, everything is in motion, and I have to react quickly, I'm delighted.
I use the lens on my Canon EOS 40D and the results were consistently very good. Also at the weight I got used quickly.
For ambitious amateur photographers, it is a real recommendation, precisely because we often times can now leave the tripod at home.
When compared with the much more expensive lenses from Canon (of course, always in the same performance class!) I was able to tell the difference from the results, not really. Maybe in the lab with test images, but not in "the wild".
From me therefore a perfect score.
