I've got the original 70-200 2.8 IS, and while I wouldn't say it equals a prime at all, I've never had any complaints.


I'd second the suggestion to check the focus accuracy for front/back focus. Personally, if I found a problem, i'd just send it into canon instead of rolling the dice again, with my body if I could spare it.


Of my collection, it's one of the last lenses I'd let go of.