“My friends and family members use this product occasionally when we drink, but we use it just for fun. We rarely rely on it to determine whether or not we are okay to drive, although it has come in handy a couple of times. Sometimes it takes more than one blow to get an accurate reading, but most of the time it seems to work just fine when waiting 20 minutes or more after eating/drinking/smoking.”
“this is the 3rd one I've bought. The first ones died much sooner than expected. Bought again on a groupon, wouldn't pay full price for it, but seems to be at least in the range or reliable.”
