[Sodman]

In the interview process, ask questions like "How many days off did you take last year?" or "How many days off in a year does an average team member take?". If the answer is <= 15, or they bristle at the very mention of the question, there's your answer!

As an anecdote, I've worked at a startup with unlimited PTO where the culture was that most folks were working 45-55 hour weeks regularly, but everyone took vacation whenever they felt they needed it. I averaged ~5 weeks of vacation per year taken during my tenure there. That was probably about par for the course with that team. As long as you're performing well while you are working, give enough advanced notice, and willing to be somewhat flexible (eg don't take 2 weeks vacation right before a big deadline with 2 days notice) - it can work out quite well for all parties.