I was so excited to get this camera and it broke my heart. I couldn't get it to focus on the broad side of a barn. I got rid of it pretty quickly. In hindsight, I probably should have / could have spent more time micro adjusting, but it was sent in with my lenses three times to Canon who failed to calibrate it. For me, a camera that cannot focus properly is completely USELESS. I didn't spend several thousand dollars on the sharpest prime lenses on the market to have my images come out soft. And for those wondering, I am a center-point AF shooter.
They also moved the buttons. I think I'm the only person that has a problem with this as no one else has mentioned it, but it was horrible. I am a manual shooter, and I shoot with three cameras, two 5DMK1's and the MK2. at first i was having problems changing settings on the fly with the MK2, but once I retrained my brain, I was using my new muscle memory on the MK1 and changing the drive mode to timer when I meant to change the ISO and other things like that.. other than flat out missing recessionals because of that, having to slow down in general and think about where my settings are was just completely throwing me off. At some point when I can afford to switch over and get three, i will do it, but for now I can't have two cameras with different layouts.
I did not spend much time with MK2. I shot two weddings with it. I did not see much difference in IQ, other than my shots being out of focus. There was more noise than I had expected after all of the "silky smooth" reports.
Overall this is just such a bummer. Maybe I'll try again later.