the Safe-Grip has met my expectations and we are very pleased with it
Have had it for a while and have not had any problems with it, such as coming off, falling off, etc.  I use it to hang a shower head, hand held extension and it holds it firmly.  Do bear in mind the extension is not the heavy, chrome or metal type.  It's a small Peerless and the head is about three to four inches or so in diameter and it is all plastic, so there is not much weight to it.  At any rate, the Safe-Grip has met my expectations and we are very pleased with it.  I would also recommend buying an extension valve to put at the top of the shower line.  That way you can control whether you want the regular shower head or the extension to work for you (both will not work at the same time).  If you are interested do a Search on shower extensions - Amazon has a bunch of good ones for about $15. or so with Prime.
Rating: 5 stars