First of all coming to price its price is way high compared to other action cameras which you can easily get for around 5k.
Then coming to picture quality it is below average , even worse than most phones. There is no sharpness. Sharpening it in post will make it look like VGA footage even though it may be 1080p.
Not user friendly at all as it has no screen to view what you are shooting.
Finally the only thing going for it is the build quality and ruggedness as it is waterproof.