Had a phone call for 30 minutes in March. Largely behavioral, but I was asked brain teasers at the end. I was flown out in September to interview in Redmond. The experience was amazing, they really treated you well by paying for all necessary expenses and any sightseeing. On the day of the interview, I got to meet the other candidates in the morning and got lunch. Then we had 4 back to back rounds. These interviews were focused largely on Algorithms and thought process. I was asked 1 recursion/DP question, 1 graph question, 1 System Design, 2 Brain teasers, and 2 basic Data Structures questions overall. The interviewers did a good job at keeping you calm and focused during the interviews. It was a great experience overall!