We purchased a GPS Keyring from Techsilver after our mum, who has dementia, went missing from home twice in quick succession. She has had it now for almost 2 months and it has been invaluable. She finds most things in life confusing right now, but has had no problems remembering that she can press the button on the keyring and we will be there to help her! She has almost left the house two more times since having it, but has called for help and I have been able to talk to her through the keyring, and give her all the reassurance and security she needs while someone is on the way to be with her. It has been an absolute godsend, and it has given me peace of mind to know that I can be there for her even when I cant be there with her!! The online help with Techsilver has also been fantastic - friendly and helpful, and clear communication. I would definitely recommend.