Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Junk...don;t waste your money.
Review: I bought this lens about 2 years ago with my 50D. First thing I noticed was the lens creep - the lens slides out VERY easily if held at any downward angle, very annoying. The worst part is, after very little use, but just out of the warranty period, the auto-focus stopped working!! Google it, these two issues are incredibly common. None of the suggested fixes worked for me and Canon wants $150 just to look at it! Canon ought to be ashamed for producing such junk and then not repairing their mistake. Very disappointed.
