Airbnb Senior IOS Engineer interview questions

Interviewed with recruiter and client rep, then had an interview with hiring manager at AirBnB. Their assistant scheduled an interview, then they kept rescheduling it - once even on a Sunday. The recruiter claimed it was the scheduling software, then the manager's changing schedule, then the assistant's fault, etc. At the interview the hiring manager didn't even apologize - perhaps wasn't even aware. Regardless, it was a very unprofessional experience.