I have owned my tracker for a couple of years and I can not fault the device. It was not only easy to set-up, but it was very easy to fit. I just bought a couple of security screws to attached the light. The initial £15 Giff Gaff sim is still going strong; I have not yet topped it up. I do not use the software on the app to monitor my cycling, I just use the GPS location: that is all I required the device for. In fact my wife uses it to check I am okay. What I do like about the tracking device is, because it is contained within a light, you can not tell it is a tracing device, and the light is excellent: automatically comes on in low light conditions. I receive warning when the battery is low and it still last all week. Excellent product.