I have been using this for around 6 weeks and it works extremely well. The only thing I would like better is a way to easily share the results from built in iPhone features such as iMessenger or Mail.
Product A1! Works as advertised, super easy to set up and use (one button connect). A lot smaller (a good thing) than I thought it would be. A tad larger than a box of matches.
I first bought one of these units for my son a couple of years ago when he turned 18. I have now bought one for my husband and other son. They are easy to use and appear to give accurate readings, although we haven't had to check them against the Police ones yet!! Certainly gives you peace of mind after a couple of drinks.
Bought my device just in time for the festive season. Works a treat, family and friends have used it before driving home and can be confident they are under the limit.