A company telling you you've got unlimited off days is actually really bad because it means they will just engage in this judging practise.
If they tell you you've got 25 days then that's great you know how many days you've got, if it's unlimited they start being argumentative around day 10. So in reality people with unlimited time off actually end up with fewer days.
Working for a European company is great, currently I'm being told that I need to take 2 weeks off, in addition to the holiday I've already booked off.
Yeah I know that's my point.