First off, this is very well made and works well with the Osmo Action camera. However, there are a few cons. First, it is quite fiddly to mount the camera on the bracket, and the two supplied screws are small and easy to lose. The instructions were not very clear and I had some difficulty as to which direction I had to place the camera.
Secondly, I wish there was a guide to where exactly we should clamp the camera. I was guessing by eye where to clamp it and the horizon wasn't quite level in the first couple of videos I took.
PGYTech should bundle two extra screws (in case the initial two are lost) and give us an indication of where we should clamp the camera on the adapter.