I had a very similar experience to one of the other reviewers: They seemed a bit arrogant and the process was arduous. After a few hours on the phone with the recruiter, it was explained to me that there would then be a take home test, a 1 hour phone coding challenge and a 4 hour coding challenge on site. They seemed to be very proud of this interview process. I heard the practice defended as a high bar with which to weed out underperforming developers. To me it sounded a bit more about maintaining an air of superiority, they are a "Bay Area startup", after all... The recruiter did strike me as well grounded and likable guy. He tried his best to tell things to me straight and sell the company as being a great bet for the future. I ended my interview process by choice before attempting the take home test because things picked up at my current job. I just couldn't justify giving some ascended San Francisco developers a full day of my time so they could judge whether I was up to their "Bay Area" standards.