Very easy, just be oneself and ask good questions. Do not be afraid to challenge the interviewers.
Answered - Sales (Former Employee) - Sunnyvale, CA
It was interesting. Combo of informal/formal and wide range of personalities. Phone screens, in persons and a panel interview. Got the job offer quickly, it was during the time HR was going through growing pains, so not sure if the process changed.
Answered - Director (Former Employee) - Bay Area, CA