FWIW, no I have not worked in a place with unlimited PTO. Heard a lot of negatives though and that's what scares me off it. The peer pressure to not take PTO would make it difficult for me to actually relax. Everyone is different though and I'm sure there are places where it works. But it's hard to determine that during the interview process. So I'd rather have the guarantee of x number of weeks of PTO where x>5.