Having read a few reviews outside of Amazon, I've been watching this camera for a while and had it on my wish list. When it came up as a flash sale offer recently, I went for it.
For the money, this is a pretty good buy. It's a tenth of the price of a GoPro and yet has many of the features of the more expensive device. Video quality is good, especially in 4K mode and the various options, such as slow-motion, and time-lapse make if very versatile. The controls are simple and quite intuitive once you've read the manual (always read the manual!). WiFi control via a smartphone app, plus the wrist-worn remote control included, make for an even easier user experience. I haven't tried the waterproof housing yet, but it looks pretty well made and capable of keeping the camera dry, at least in the rain.
An added bonus is that one of the several mounts supplied with the camera allow it to be fitted as a dashcam in the car. Switching on the Driving Mode option means that the camera will start/stop when the cars ignition is turned on or off, and Loop Mode means that even on long journeys, the camera will keep recording. It copes well with varying light conditions and even manages to capture useable images at night on unlit roads (provided you've got your headlights on!).
All in all, a pretty good buy.