The last camera that I can honestly say I enjoy as much as the 5D3 is the D60 (not the 60D, I'm speaking of the camera before the 10D). Every body I've had since then (10D, 30D, 5D1), has been unreliable with AF. Instead of concentrating on framing a shot, I'm constantly worried about whether it will miss focus. With the D60, if it locked focus(sometimes this was a big if!), it was on the mark, nearly every time. I feel the same way with the 5D3, but now I get super fast focus too! I've been waiting for this camera since I got my first canon dslr.