Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Canon 580 EX II
Review: This flash replaced my old 550EX. It is smaller and a bit more powerful. The camera mount and the battery compartment design are a great improvement from the 550EX. Only shortfall so far is that it seems to create a hot spot in the center of the images in the 24-50 mm zoom range when used with the 40D Canon Camera; works fine in the EOS 1Ds series.
