I've been interviewed by 3 members, my future manager and team leader and another group's team leader. The environment is very friendly, informal and relaxing and they immediately make you feel comfortable. The interview lasted about an hour, half of which was explanation of the job and answers to my questions.

An interview with three senior management members. Two from California and one from New York. Invited to Google Chelsea office, checked in with security, invited upstairs to guest waiting room, picked up by a member of the interview team and escorted to interview room. Very small, intimate room for four people. Questions we're behavioral and competency questions, no many on background or qualifications.