I know someone who works at a startup with unlimited vacation, and for most employees there it apparently turns out to be about 3 weeks of actual vacations take

I know someone who works at a startup with unlimited vacation, and for most employees there it apparently turns out to be about 3 weeks of actual vacations taken (he defined it as left your home city for at least 2 days). They do use more single days here and there than they would otherwise, and they don't have to lie about being sick to use sick days. If I started a company, I'd want to offer unlimited vacation.