I applied through a recruiter. The process took 3 weeks. I interviewed at Boston Consulting Group (Boston, MA) in July 2016
Interview
5 Interviews with 9 people over a three week period. Long process but well done on their part. The long process might have been a problem for someone who was currently employed and discreetly job seeking.
Interview questions [1]
Question 1
Most of the interviewers asked general/expected questions. I didn't feel that any questions were tough or inappropriate.