The comment you're replying to isn't disagreeing with the sentences but with the additional hassle on top of the sentence. Do you think that additional ad-hoc punishment is justified? Where would you draw the line?
If the people of the country were more constitution minded, they would want a punishment that fits the crime, and no additional punishment on top of it. So I share this gripe, even though I consider DUI a very serious crime (including those who do it and don't get caught).
Interlock devices aren't "ad-hoc punishments," they are making sure someone with a history of driving drunk can't start their car when they are drunk for a very, very short period of time. 1 year is common and is extremely lenient.
I've been hit by a drunk driver before. I know this will be a very unpopular opinion but I believe a single instance of DUI should be enough for a permanent prohibition on an individual owning or operating a motor vehicle. These interlock devices are already a weak compromise catering to people who oppose inconveniencing those who have already proven themselves to recklessly endanger the public when allowed to operate vehicles.