I had a Draeger Interlock breathalyzer in my vehicle for a year and a half. The whole time I had zero issues and I like that the unit is a small, black, and easily concealed. Pricing wasn't bad either. Customer service was good and bad, sometimes they are nice other times you feel judged. Make sure you call the place you are being serviced to make sure the appointment is actually set up. All and all a great company! read more