Rig - Fitting Gopro Hero 9 with Supersuit on GB-U70 is too tight leaving millimeters spacing. Tight space for removing screws and pressing record button. Probably this design is produced before the release of gopro 9.
Gopro mount - The plastic kinda too soft and seem to break easily. If you don't want to lose your Gopro, double secure with extra string tied to the rig itself.
LED light - for that price I considered the build quality as OK. Still be careful with the mounting plastic. Do not over tighten the mounting screws.
IF you have big hands and using gopro 9, Please consider getting GB-U80 instead.