I received my GX85 a few days ago but yesterday was the first opportunity to try it out.  The GX85 with the Leica 100-400 is a superb combination.  Both these images are considerable crops.  There are two recently fledged Downy Woodpeckers, a male and a female who frequent the back yard.  I am most impressed with the detail from the GX85 (no anti-aliassing filter) and excellent image stabilization.