There were multiple rounds of interview. Largely a test on culture fit, and overall it is what is to be expected if you prepare and do your research. I enjoyed the process.

series of 1:1 interviews covering my thinking process, personal experience and life decisions, and future goals; group debate on an issue; external phone call IQ-like assessment resulting in an objective score

Interesting interview, round table discussion with high caliber talent. I had a series of 2 interviews, and then a interview with a group. The topic of conversation was unexpected but it was great to hear everyones perspectives and witness first hand the radical transparency appraoch.