A Good camera, same internals as Foxxeer Legend 3, and not a bad price depending on quality of 4K....
But I reckon they missed a trick here, it's bigger than the GoPro to avoid copyright issues, fair enough, but it will not fit the many accessories that now exist for the GoPro, that can't be helped of course.
...but, If they had tried to make it slightly smaller instead to avoid copyright then use of an adaptor would make it fit the accessories. Making it smaller is tricky of course, but meh they could have done this I'm sure...
Doh!