I had to get one on my car due to a dui, here in Fl. they do work but they do not function well. Many times it will say blow harder or blow softer or hum louder, general pain in the ass. But if you want to drive, ehich is a privlage and not a right then thats that. The general public would never accept the devices as they are now. They are not very user friendy, many times I have to blow multiple times and it automatically tests 5 minutes after initial start up. After that it is randome up to 40 minutes. Around town jaunts that are only 6 or 7 minutes are a pain. You have to blow twice to get where your going then do it again after your stop for every little stop. Long distances are not too bad. They do not function well, they would have to be alot better before the public would accept them.........Steven
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