As a cat owner of two new kittens, I fully researched a number of products and decided on petTracer for the GPS and Radio options - as the most likely place a cat will get locked in is a shed meaning GOS may not work. The initial setup was flakey - didn’t recognise devices but working in IT I know how to fix these, a novice may struggle. Also website kept popping up in the wrong launage. But Once up and running, we have been extremely pleased with the way it works. Battery life is an issue but we have it on middle updates while they are still exploring my neighbours gardens, this should improve when we set it to the lowest (although 30 days seems a stretch). Gives a real piece of mind, and glad we purchased this.