Agreed. That said you get people that party till they drop and when they wake-up they think they are ok because they cannot remember the amount of alcohol they consumed nor have a good idea on how much time has passed. So there is a true danger that they may drive a car or go to work “still intoxicated” Especially in South Africa we get people that can function normally while they had a few drinks behind them.

So this is basically just reality check to see that you are ok to drive and go to work. If you are the informed responsible drinker there is always a chance that forgot something so it remains a plus for them to have this device. But it is simply a must have if the person in question is a hardcore drinker.