After a stupid drunk driving mistake, the court ordered me to install a breathalyzer. I chose Intoxalock. Installation was quick, the device is easy to use, and you can just blow and drive without any hassle. Calibrations are regular, but the center is nearby, and customer support helped with a couple of battery issues. I later found
Intoxalock reviews — stories vary, but many praise its reliability and convenience. If you're forced to install one, check them out beforehand; it'll help you understand the nuances.