I only have details for two people going through their interviews, but one of them took about 16 hours of in person time, and the other involved flying out to a

I only have details for two people going through their interviews, but one of them took about 16 hours of in person time, and the other involved flying out to a different city for a day of interviews after ~6 hours of phone screening + a clusterfuckload of email time (partly due to some monumental incompetence on behalf of their HR department: when the recruiter involved left they said they had to restart the entire process).