Like most owners who ditched there run flats,I have the onboard compressor and sealant, as yet not needed to use it, but no doubt if and when I do it will be at night raining and on a pitch black country road. So is there a better answer? I have read and heard the pros and cons of puncturesafe, but I would like to hear if anyone has it installed and whether it has caused problems, or does it do what it say's on the tin. Comments appreciated.