Avoid DUI
I ordered the device just so I would have some idea of how "OK" I was or was not.  My gal and I like to eat out and have drinks w/ dinner and/or friends and we most always have to drive somewhere.  This device helps me/her know if we are in danger of exceeding the legal limit or not.  The device was easy to set up and I experimented with it a little bit at home and it seems to be spot on.  I would recommend one for any person who does drink, or has friends that drink and then have to drive.  Data is always better than a guess.
Rating: 5 stars