Got mine as well. I am very pleased with it so far.
The sharpness wide open is very good. Pairing this with IS and wide open being 2.8, I suspect this "macro" lens will spend some significant time on my 5D for general shooting. Both 24-70 at 70 and 24-105 don't even come close to this one sharpness-wise.
AF is nice, quick and quiet in decent light. But above ISO 2500 it starts hunting and is not snappy anymore. Overall 24-70's AF is noticably better.
Build quality is good, yet somehow I feel that 24-70 or 24-105 are beefier, and I am not just talking about weight here
. It very subtle difference though and doesn't affect 100L's operation-wise.





