I have been extremely happy with the tempered glass product. Once putting onto my fitbit, it has not moved or lifted and the touch sensitivity is just the same as without it on. It was easy to put on, just don't do it when you are rushed and get it right the first time.
These screen protectors came in really good packaging and the quality is genuine. It is thicker compared to other cheaper qualities of “tempered glass” and yet sensitive to touch when you have it on. Very easy to apply, highly recommend these.