I applied through a recruiter. The process took 3 days. I interviewed at Google in May 2010
Interview
The PM's at Google seem to be a culture fit MAINLY for Google.. The interview folks were nice, but no one much cares for your past experience. And what you do at Google, may or may not be very applicable to PM roles elsewhere.. There are many PM posts that will not have any transferable knowledge..
Very self-driven, first of multiple rounds, where I had to take the initiative to arrive at the problem, constraints, approach, solutions, tradeoffs and reasoning behind it in a matter of 30 minutes.
You would have to do a hiring assessment first, then a recruiter screening follows. First round interview with the hiring manager. Majorly product sense and product improvement. The questions were not direct though.
Overall a lot of steps to the interview process. Talked to different people and had opportunities to ask questions. Many different stages which made it a lengthy process overall. Wasn't too bad.