Just a phone screen. Everything went very well until I questioned the interviewer about the culture issues brought up in the press and about Bezos's style. Right then the interview ended abruptly. Like stepping on a land-mine. My advice would be to not mention the article or Bezos at all. One other piece of advice when answering the python coding question is to think about using generators rather than loops - I think the interviewer was looking for that as well.

8 rounds. 6 technical, one hr and one behavioral. Couple system design, couple coding and one past experiences round. System design is not too hard but you have to have meaty past experiences to justify the position.