“I find the device very helpful in assessing myself before using my car's ignition interlock breathalyzer, however somtimes it will work consistently but then suddenly be wildly inaccurate (this is rare and a re-test usually works) - also, as others have suggested, the unit is very fragile... the screen cracked in my pocket apparently from hard contact with my keys, and the battery cover pops off when dropped. Still works though.”
“I had purchased the BACtrack keychain breathalyzer due to the fact I have an interlock in my vehicle. I had previously failed a few tests. I can't keep affording it so I decided to get this to help me. So far it has worked great. No fails in almost a month. Can't wait to be off my interlock. Happy to have this small device though to help myself and my friends and family and others see that it is not safe to drive even after just few drinks your bac could be really high”
“already worth the price paid for the device, as it helped my boyfriend not get behind the wheel after going out with some friends one night. the product does go through batteries quickly though. still worth it! i would say i doubt i will get it calibrated, because its about as much to buy another new one as it is to pay for calibration.”