I have a friend living in Japan that is using one. The camera has gotten some really good reviews and seems to me it's a matter if you like the size or not.
From what I have gathered
(from reviews)
EVF doesn't have the rain bow effect as it is OLED
4K video is pretty good
IBIS is ok, not as good as Oly but better than nothing
Focusing is hyper fast
From my friend's talks and looking at some files
- Seems like Panasonic reined in better the chroma noise in those files (raw files too) at high iso
- Sensor as implemented seems as good as best m4/3rrds right now if not a notch better (a little better DR) but at 20 megapixels... so a slight increase in resolution keeping the quality up. That's good.
Seems to me the camera is ergonomically sound. My only objection is the size, since I don't like bigger cameras. But that may not affect other people particularly those who wanted a nicier grip- one way to look at it is you don't have to buy a grip attachment because the camera is big enough/grippy enough out of the box.
- Ricardo