To keep it nice and simple: GoPro Hero 7 Black is a great camera and HyperSmooth is just an amazing option. Really, HyperSmooth does the job on FPV quads in a way that I did not expect was possible without a real gimbal. But… like always, there are buts: GoPro Hero 7 Black is bloody expensive, heavy and not that tough as you might imagine. I hit a twig and LCD cracked… for a 400 EUR that was rather unexpected.
And finally example footage recorded with GoPro Hero 7 Black on this year's holiday in the mountains