I am starting one First shots w/ gx7 + Oly 75-300mm & Zeiss Makro zf 100mm, at the local Black Hill Park just before the sunset so mostly at high iso's: All were shot hand held w/ e-shutter. It is very silent, no hiss noise of Oly IS either. A tripod and flash could have helped, but this was just quick trial of these 2 lenses esp w/ IS and also the focus peaking. Hopefully they will improve the e-shutter read speed, because getting rid of shutter vibr is very good. It is as useful as 5 dim IBIS of Olympus. Focus peaking works but I prefer the red peaking color from nex and also the middle enlargement is too small on the evf. I have to find/use the full size enlargement w/ evf. The size of the body is good w/ bigger lenses, but a little grip could have helped. It is similar size to e-m5 w/o the viewfinder hump. All shots processed in lightroom w/ VSCO velvia preset except last 2 shots.