Good for the price. Bought it because I wanted to be able to film in 1080p60 which ordinary hero can not cope. Plus screen in the bargain!
Better picture than expected at night (at least after reading reviews about ordinary Hero), unfortunately much worse during the day. These are mainly the artifacts that interfere. Further, the videos also brutally large, after conversion through the software I got a 9:03 minute film to take up the entire 8,51GB!
After the second day in my possession, I received notification of firmware updates, updated immediately and the program crashed. Waited 20 minutes and pulled out of the camera. Now sits firmly in a ten minute long boot loop until it finds a memory card, appears to be no gap when it loses it again if you turn the camera upside down. Once you have started filming, it is oddly enough a bell. Will try to get hold of an adapter and flash it using the memory card.