I can't say I ever enjoyed a camera more than the em1 I have for a year now. and I had many! it is the camera I carry everywhere, it is just a tad too big to carry comfortably in summer jackets. so spring is upon us and the smaller em5mk2 is out, so I bought it two weeks ago. I can't judge on image quality as LR isn't supporting its RAWs yet. I don't do jpgs. A few observations: - the smaller size is great, thought the ergonomics of the buttons on the em1 is much better. those top buttons are hard to distinguish whith the camera to the eye. - the twist and fold out screen sucks. I don't do selfies, so my main use for the tiltable screen is for low to the ground shots and most importantly, switching off the eye sensor when reviewing or showing pictures. it is just cumbersome with the em5 screen. - the shutter feeling is much better with the em1, the em5 makes a much more rubbery sound, it just doesn't feel as snappy as the em1's. nice to have a no-sound-option, but I prefer a snappy feedback. I can feel the shutter in the handgrip of the em5, but I have yet to detect whether it shows up in shutter shock. - AF is better with the em1, I tend to have more missed focus with the em5 - the em5's SD-card door is beefier, but fiddlier to get the card in and out. - Battery life sems to be better with the em1, but maybe I play around more at the moment with my new camera. - em5's better movie mode is nice, though the AF is unusable with video. the inbuilt mice seems to be better too. so altogether: I like the Olympus OM-D E-M5 mark 2, but prefer the em1.