Only had one interview but it went on longer than an hour as they just asked more questions and wanted to know everything instead of waiting to do another round.
Interview questions [1]
Question 1
What sets you apart as a Product Manager compared to other candidates?
You meet with 2 people over an interview. Once with HR and another with the CEO. For an unpaid role, I think that's a bit excessive, as the second interview just mainly asked the same questions as the first.