I got an interview through a referral. All communications were very cordial, and my impression of the office culture was that it was surprisingly calm and upbeat. The interview process consists of two short interviews with different consultants. In each of the two, you briefly go through your resume and talk about your background, then delve into a case question. Although I was very nervous and faltered during the first interview, my interviewer was kind and offered help when I needed it. My second interview went much better — I would almost say it was fun, and my interviewer was very friendly. Overall a very positive experience.