I was referred by an employee. The interview process was the usual deal. The phone interview had two easy questions. I typed down the answer very fast, and hence got a positive feedback at the Google side. The onsite consisted of four interviews, all of which were standard problem solving. I thought I did ok but got rejected at last. I want to point out that during the process, everyone was very friendly and prompt. My handler worked fast, making the whole thing compact. Overall a very good experience.