How's the vacation policy at XYZ.com?

Horrible. You might schedule for your vacation, and it can be cancelled by anybody, for whatever reason. Unused vacation cannot be carried over from year to year under any circumstance - use it or lose it, so more often than not, unless you are part of senior management, you will lose your vacation days every year you work here. They kind of allude to that fact during the interview and hiring process, by using phrases such as "are you available for work 24/7/365 - as everybody here is always on call" but you don't realize what this might mean until you've been here.