Fairly long and detailed interview process. I didn't mind it though as it helped ensure they were hiring top tier talent that fit well with the company culture. I ended up doing at least 3 phone interviews, one with a culture ambassador, and 3 in-person interview sessions where I was interviewed by at minimum 2 people per session.

In the interview, you are asked dozens of seemingly meaningless questions. They are trying to get a feel for whether you have good reasoning and analytical skills. From their point of view, it is a very worthwhile interview. From your point of view, very little information about the job is disseminated, resulting in your not really knowing what you will do before you arrive.