Having your interview re scheduled


So, I was talking to some friends about this the other day and wondered what other people thought.

One of my friends has just had their interview rescheduled for a major grad recruiter. They are a bit miffed, but have heard stories that this company often reschedule interviews upto 3 times!

How would you feel if you had your interview rescheduled that much and should my friend keep waiting on this interview (they already have another offer, but really want this company)