I've recently started shooting with a Sony A7r II and have been very impressed with it's size, functionality and image quality. I wanted to see how it compared with my Pentax 645Z digital medium format camera in certain shooting situations. I also threw in my Canon 5d III out of interest.
It was an interesting test and I was surprised by some of the results. If you're interested take a look here -bristol-photography-blog/2015/11/19/sony-a7r-ii-vs-pentax-645z-vs-canon-5dmk-iii