As the dark days of winter hang on seemingly forever, bringing chilly winds and snowstorms to many parts of the U.S., taking some time off to escape to warmer climes is surely looking like a good option. But what if employees could take all of the time off they wanted to jet off to a tropical island or just hang out in their well-heated homes? Some companies, particularly in the tech sector, have policies that give employees unlimited vacation—a proposition that can be both a big draw and a potential danger.

Unlimited vacation sounds like a great way to boost employee morale—and it can be—but it’s not the right policy for every company and every employee, according to Jurate Schwartz of Proskauer Rose’s employment law counseling and training practice.