Fairly easy and free flowing conversation and it seemed more like a chat than an interview. They answered my questions generously and with clarity. There were a total of 3 rounds.
Phone interview
1 week assignment
Presentation
Estimation problems
Leadership interview
Lunch
Presentation asked for recommendation of new feature--"the more detailed you are the more likely you are to be successful"
Have to show everything you did to get to the feature recommendation, detailed wireframes, etc
Decision is made by panel of all interviewers.