Can I say how Happy I am with this thing in a post like this? Well I just did.
At first I had my doubts but now after shooting with it for a while I now know what all the hype is all about. From IS to USM to Instant AF (I mean is there a word faster than instant I can say?) This lens locks on focus in a blink of an eye.
I am getting VERY consistent focus with this lens, however I can only compare it to my 1980 something 50mm f1.8 Mk I. I still love that lens though too.
Sorry I just had to say something, and no I don't work for Canon