Thorough - They do the standard recruiter call to screen any crazy peeps - doesn't take much more than competent communication to get to the next round. Then you speak with a team memeber about relevant experiences - the next interview is about the same but you get a case question which tests your problem solving skills/quantification abilities example: How many people take the bus everyday in San Francisco.

I applied online and had 2 phone interviews where I was asked fairly typical questions about my background and why I was interested in the company and the position. The final round was attending a Career Day in the San Mateo office (they paid for all of the expenses). It started off with a company lunch where I met some of the people that I would be working with. I got an extremely positive vibe in terms of culture and it seemed like a very fun and rewarding place to work. The rest of the afternoon was 4 back-to-back interviews which were fairly challenging, 3 of them had case study questions that tested my analytical and problem solving skills