Great idea for added bike security and peace of mind. Much better than having your postcode stamped into your bottom bracket housing down at the police station anyhow. Very easy to fit. Fitted mine is seconds. Online registration not as easy as it could be. The website is very poorly laid out and I would of like to have had to enter the tag code into a specific place and not just as another identifier. What is good about the online registration is that you can upload pictures of your bike and write a detailed description and give details of any distinguishing marks. All in all a great product.