I had never considered the convenience of this magnetic accessory and, after trying it on a weekend away, I realized that it is simply fantastic.
In my case I installed it in the jacket which, having a pocket at chest height, was perfect. The installation is very simple, I put the iron plate inside the pocket and applied the magnetic part on the outside. Having only the thickness of the pocket without padding, the attraction power of the magnet is more than enough to keep the camera in place even when running. I tried to install it through a padded jacket but having a significant thickness it does not have enough strength to stay in place.
In any case, each piece, both the base plate and the one with the bracket, have eyelets and laces to secure the camera in case the magnet comes loose.

I find it to be an excellent object that must be part of the kit of every action cam, thanks to the magnet the opportunities for use are truly many.

The only small flaw that would have made it perfect is that the bracket for the camera is fixed and is not mounted on a joint. Given the price at which it is sold, it's fine like this!