MMI format, kind of a tricky interview but overall very thoughtful. Best way to prepare is to attend their provided workshop to understand what types of questions they will ask.

I applied online a month prior to the interview. Within a month, they notified me for an interview. The interview was in a MMI format. There were three performance based questions and three behavioral questions. Prior to the interview their was a workshop which I think was very helpful since they had a mock interview.