I had two one hour phone screens followed by an in-person interview. The phone screens were fairly rigorous and included a fizzbuzz. The interviewers were friendly and professional, and they squeezed a lot of questions into the hour. I received feedback within 48 hours of the first interview, and after the second interview I was told they would bring me in for an in-person interview as soon as the hour ended. Afterwards, they told me that they had high failure rates for the in-person interview, so they instituted a new process of requiring two phone screens instead of one, and shortening the in-person interview from 6 hours to 4. I don't know if this is company-wide, but I like the system. The in-person interview was a combination of panel interviews (e.g. two engineers asking me questions) and the more senior people did one-on-one. They asked questions specific to the domain knowledge on my resume as well as some general questions specific to their own environment. There were also some algorithm questions/problems. Most of the time I was on my feet at the whiteboard. The interview was very thorough, no inappropriate questions were asked. Some of the questions/puzzles were quite creative and I enjoyed working through them. Had a great time and wished the interview would last a bit longer as the puzzles were interesting and had multiple levels and/or multiple solutions. I think part of the interview process was to see how far you can get in the time allotted.