Most of the other add-on TPMSs require the bike to be moving for some distance to wake up the senors. Not very convenient first thing in the morning. With these, if you have a bluetooth connection (they use your phone as the display), they wil register in a minute or two will standing still. I liked the set so much, I bought another for my other bike. Only catch is, I haven't had them long enough to know about battery life.