9 out of 10 points and recommendedlight, fast, very good AF, build qualityno hood supplied, some CA may happen,
Very good lens. I bought it for indoor sport (karate), and it is very good for it on a 400D.reviewed December 23rd, 2006 (purchased for $459)
Wide open, it is not that sharp, as could be expected : it's better to center and reframe with a editing tool. 400D has enough pixels for it...
I had one or two case of strong CA using it outside and wide open, but never got any when using it indoor, even with white karategi against black wall.
It is just long enough to stay away from action and get nice shots. Sometimes, it is a bit too long, for example if you have to take a group photo.
However, I wouldn't trade it for a zoom, I like it too much ;-)