Wait, so you get "unlimited" paid vacation days? That sounds like complete corporate bullshit to me.. Who decideds when/if "work is done" or not? Even if your work isn't done (there is always more to do), you still deserve vacation/days off.
How many paid vacation days do people take on average a year? How many did you take this year/last year? What happens if your company decides that you have taken too many vacation days this year, will they mention it you want to discuss wages? What happens if someone doesn't take a minimum number of vacation days a year, will they be forced to take them or will they get praise for being a "hard worker"?