Have had it for a while and find it handy for a wide array of things however find the other features and modes tricky to figure out but the base fuction works great
I received this breathalyzer as a gift from my wife and it works very well. I use this every now and then to determine where I fall on the concentration scale before I leave somewhere I've been drinking. Having already received one DWI, I feel this professional grade breathalyzer is money well-spent to help me be proactive in making better judgment calls for driving after drinking. I would highly recommend this product and have already showed it to many of my friends.
So far, no complaints. I keep it in my glove compartment to use after I've been out to dinner or happy hour with my wife. I don't usually have more than 2 drinks, but it's nice being able to confirm that I'm ok to drive. I've had too many friends end up with DUI's - better safe than sorry!