I don’t have any experience with Canon mirrorless cameras but I have a Sony A7 and it works very well. I have got used to the fact that I have to turn the camera on to see things through the viewfinder and you get a lot of image sensor are in a very lightweight body. The very short back focus is also nice since, with a suitable adaptor, you can use some very good, old prime lenses that you can’t use on EF mount cameras. It is worth noting that you will need an adaptor to use your existing EF lenses on this camera since the EF-M lens mount on the mirrorless cameras is designed for much shorter back focus lenses. I hope that the Canon mirrorless cameras use the same raw format as their DSLRs do. It is a well designed format that is really raw. The Sony raw format is absolute rubbish.