This is the 3rd alarm we've bought for our 90 year old mother from various companies and so far it is the most reliable. As she lives in a rural town, signal coverage has always been an intermittent problem but with her tracker now choosing the best from O2, EE and Vodafone, we can see exactly where she is all the time. A big improvement. SOS and fall alerts are working well too so well pleased. The company were quick to dispatch and help set up which was pretty easy. It could do with an app so you can view the routes the tracker has taken but the company say they are working on this. However by just sending a text to the tracker you can find out within seconds where she is, and when you phone it she can speak to us despite it being buried under her jumper when she's out for a walk.