So I have had a 450D(Rebel XSi) for about 2 years now, and although it is a pretty solid camera, I feel as if it is time to upgrade. I've had my eyes set on the 5D2 for quite some time now, however I have heard some mixed reviews about some aspects of this camera, mainly being the auto focus.
So I was just wondering if anyone could tell me about their experiences with the 5D2 and if the auto focus is as bad as people have been saying? 



