“I have learned a lot about myself and how alcohol can be deceiving once you start drinking. I can pull out the key chain in the palm of my hand discreetly and quickly check my BAC anywhere.”
“I just bought one for my college daughter and for myself. It's the best way to make sure I should legally drive after having a drink at lunch or dinner.”
“The idea is great but it often doesn't work the first time and sometimes the second time. Seems to be glitchy. On Saturday night, a friend of mine who had three glasses of wine and a little whiskey blew a 0.00 -- clearly not right. I need to be able to depend on the number to use it wisely. Disappointing. I had the simpler version (that doesn't tie into my smartphone) and it worked great.”
“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.”