Too early to tell, but so far so good. For those who have the interlock, this is the way to go. I suggest not getting the insurance due to the cost of calibration. It seems cheaper just to buy another one.

Think it was a very good buy. Nice to have handy to insure everyone drives safe👍

It works

It’s great. Little and light and easy to use

It is very accurate when used how instructions state.

simple to use and are pretty accurate.

So much fun

Awesome tool... More used as a toy... but really enjoy using it. When people blow over the limit... they DO NOT leave my home!!!

This is a great device. Used very much and it was very functional.

Fun little thing but finicky with the on and off. Would just die mid test. I ended up getting a more expensive one off Amazon and it's way better and worth the money.