What I liked
It fitted into a small pouch on my husbands belt and looked like a pager - he used to be a Policeman so this was helpful and was familiar to him.
The map platform was easy to use to see where he was - I could check it on my iPad or laptop and so could my son and daughter.
It had a speed gauge so I knew if he had gotten onto a bus or in a taxi.
The SOS button was there so he could press it if he needed me.
I found it easy to use and gave us the piece of mind when he was out and about walking with the dog which was important to us as he saw his usual fellow dog walkers and it gave me time to myself.