I love all these "responsible" people on the boards who feel that everyone should "know" exactly where they are on the inebriated scale. This isn't something you use when you're hanging out at a friend's house pounding shot after shot of Jagermeister. This is more apt to be used when you've gone out to the bar to chat with friends and listen to some live music and have had 3 beers.
Have none of you ever been to a bar that had a breathalyzer tool already set up (usually near the bathrooms)? You drop in a quarter, blow through a straw, and it gives you a green, yellow, or red light based on where you're at. It's not meant to be the be-all-end-all way to determine if you're good to drive. If anything, it's just fun and interesting. If you have your own internal breathalyzer, bully for you. The rest of us humans might enjoy having something that could be beneficial in avoiding a costly mistake.
That being said, the process described by these folks is not ideal. I'm not throwing on some bulky device just to test my breath. Maybe Apple should innovate and create an internal one in their next iPhone revamp that allows you to just blow into the microphone.
