Tony & Chelsea Northrup posted their full Panasonic GH5 review.
And today 43rumors Alex shared a possible bug on the new GH5 1.1 firmware:
Just upgrade GH5 to the latest 1.1 firmware and tested it in the field. The camera occasionally mis-report “card full” on switching on. During the 5-day shooting in Thailand, I experienced twice. Generally speaking, switching off the camera and on again should fix the problem. I was using SanDisk Extreme Pro UHS-I U3 128GB card.
Hope Panasonic will read this and fix it soon.