I was surprised and give high marks for a very well-run PM recruiting process at Facebook. I had a friend there get my resume to the PM recruiter, who called within a few days. The recruiter was extremely knowledgeable and conducted a rather in-depth screening interview himself that lasted 20-30 minutes. At the end of the interview he was very forward that I passed his smoke test and needed to get in for some on-site interviews. He was very communicative over the course of the next few days (first call was on Tuesday) and set up 2 interviews by the end of that week. He called the day before the interviews to prep me. The first two on-site interviews with PMs were much more congenial and collaborative than other BigCo PM interviews I've had. I was impressed. The personality they're looking for shines through and it's obvious that they give a good amount of autonomy and power to their PMs. The internal recruiter took 10-15 minutes to give me a tour, chat about anything, and was very informative and warm. The PM recruiting team communicated often to let me know where they were in the process, and I had a go-ahead for 2nd round interviews within a week. Again I was prepped a day before interviews. I had 4 interviews scheduled for my 2nd round, each about 45 minutes long. Questions ranged from product/feature design to mapping the flow of interactions between people and discussing needs/motivation to general industry knowledge and strategy. None of the interviewers were hostile or cold. Although I was not given an offer, I was again surprised and quite happy that the recruiter reached out to offer feedback. He shared details of what I did well and what I could improve on by phone.