[stoppingdown]

Well, 40-70% of sharp shots at 1/20 is good for me (macro apart).

For what concerns the lens, I'm still collecting data. I can understand why some people blamed its AF: if you're used to superfast and completely silent AF, this is not the case. But noise can only harm those who do audio recording. For the speed, at the moment I can say I've lost some shots because of it, but I am not yet acquainted with the ergonomics. I mean: the focus limiter is certainly important and my finger doesn't find it automatically yet, furthermore I'm not able yet to visualize where the limit between the two zones falls. It's likely that those shots have been lost because of the time I spent searching for the button, and in some cases it wasn't properly set. So I won't draw a conclusion before a certain number of sessions.