One factor to consider (depending on your locality) is that "unlimited" time off doesn't allow you to accrue vacation days, that would be paid if you were e.g. laid off.

Absolutely, which is why I make sure to take more time off than any vacation days I would likely receive.

when I had "unlimited" pto, my boss took three months a year, I got two weeks at Christmas

it is a question of priorities, and every vacation you take suddenly requires review

Congratulations, you work for a very nice company.