The problem I have with them is typically they are a one shot deal. Get a flat then replace the tire. Thats just silly to me. I can buy a full size spare (tire and rim) for less than the cost of just one run flat tire. I have a tire machine (manual) in my garage, I can fix normal tires with flats (usually). Run flats? Not so much, after they have been driven on. Im glad they work for you though, its just not my cup of tea.