It Works.
Not the best possible camera but for the price it is better than many. I found it slightly better than the SJCAM4000. However low light levels result in a reduced frame rate. Thus if you need the slow-motion (120fps) settings you need to have a well lit scene.
Feels good quality. Battery lasts better than some others. Slightly jerky on full 4K but pretty good on 1080p.
Ideal for use where you wouldn't want to risk a more expensive camera.