Feels real stable, good video and sound recording.
Bought me for 1580kr (£ 136.67 with express shipping) incl. Selfie Stick & Bluetooth Remote during amazon mid-month tour.
More or less everything like a gopro :)
+ Real camera mount.
+ Large screen.
+ Single GUI and App for pairing with the mobile.
Only 3 negative issues.
- not waterproof without case.
- Can not open the battery cover if using the bracket (would sit on the side instead)
- no external mic jack
There is a Yi 4K + that solves some of the negative things.