Well I have had the GX7 now for nearly 3 weeks, not much time to spend a day shooting with it until yesterday, and I have decided it is a keeper.
Handling, it is a great body and in some ways better than the GH3, feels like a sibling for sure, quite a bit lighter and a much better viewfinder with accurate colour and exposure display is a bonus. The GH3 certainly does not display WYSIWYG as accurately as the rear display screen. Ok for composing but not even close for colour or exposure.
Ergonomics, a good feel in the hand, enough buttons in a familiar location for users of the GX1 and LX7 works for me. I find I am using the Custom settings more to save time, work well. The focus peaking while not as good as the Sony A77 is a help for manual focusing, and being able to control the enlargment area while leaving the background as viewed is great.
I opted for the Panasonic eye cup add on, this reduces the flashes of peripheral sunlight when using the EVF, an excellent addition which will stay on the camera permanently.
Here are a couple of samples and link to the gallery, shot in JPG, all quickly and hand held, from the Brisbane Open Buildlings day yesterday. I spent the day in the hazy sun with the GX7, 12-35mm and 7-14mm Panasonic lenses. A small bag easy on the shoulder, and at no time did I wish for the GH3, A77 or any of my past Nikons. No special attention to settings, all on the fly while walking with a group of people mostly
Brisbane city, viewed from the patio of the Gallery of Modern Art building on the river precinct.
The Hotel on The Park, a heritage building now part of the Treasury Casino
The rest of the series... http://photos.photo-matix.com.au/p1004082109