I interviewed with 5 people, spanning a half-day, starting with the hiring manager. The hiring manager did an awful lot of the talking. It was a challenge to answer to the hiring manager with much substance, since time was so limited. As I moved on to later interviews with less central roles in the hiring process, then there was almost too much time allocated. My impression is that it is a healthy culture there, but it's only an impression from the particular people I interviewed with. There were no particularly tricky questions from anyone.