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Or any other good tutorial/guide builder for a website would be good.
I can see the advantage for someone who currently has 2-3 weeks of vacation to increase to 'unlimited vacation days' and then take 4-5 weeks in a year. However for people who already have an above average number of vacation days (5 weeks or more), it doesn't seem like an advantage to have 'unlimited' vacation days. In a field of people all with 'unlimited' days, it seems like you would be an outlier if you attempted to take more days than the rest.
What are your thoughts or experiences with this concept? Also, how many days have you (or someone you know) actually taken with unlimited vacation days.