One of my tests, living in cold country is: "Can it be operated with out removing gloves?" When I received my EM-5, I was skeptical of it's usability period, because of the tiny, close together buttons, etc. Now, after a couple of weeks, and less than 100 pictures, getting the settings basically to my liking. I can take a walk with the P20 mounted, aperture priority, turn on and off, change aperture, exposure comp, etc., With my thin leather, lined gloves on. A bonus is, that I carry it palmed, with the "hump" in the palm, and the base resting against the thigh. It is comfortable, and ready. On the tripod it is just as ready. With the OM 50mm, adapted, I can manual focus quite easily, if I use the EVF in magnify mode. All in all, we seem to be getting on quite well. Still need to work on picture mode settings. Feel free to add your criteria. No arguments! Please.