Birst Engineering interview questions

The folks at Birst are very unprofessional. They set-up a phone interview with me - forgot to call me. Apologized profusely to me, so I spoke to them after about a weeks. That discuss was pretty good and they invited me onsite to interview with a few other folks and meet the team. 10 mts before my interview they called me to tell me that they have extended an offer to someone and they do not want to meet me - My onsite Interview was cancelled 10 mts before the scheduled time !! They seem to be very unorganized and were very unprofessional !!! Please make sure that you call them and confirm that your interview is still on - before you leave your house.