Applied online and found out it was through an outside consulting firm. I had a phone interview, one in person interview and another phone interview. The phone interviews were general (tell me about yourself, what brought you to BCG, can you talk about X experience at Y place, etc.). The in-person interview was more extensive. Questions about work history, specific projects I had done, how did I feel about doing certain tasks that would be required in this role, what information did I feel was relevant if a consultant needed more information about Department of Z in the US government. All three interviewers (I only had one interviewer per round, the phone interviews were with women, the in-person one was with a man) were all polite and nice and I felt it was genuinely pleasant conversations with each of them. I did feel that the in-person interviewer (whom the incumbent would be working with) and I did just did not connect and I was distinctly less interest interested in the job as I advanced through the interview rounds. I somewhat suspect that particular experiences on my resume were of interest to this interviewer, but not necessarily as a means for actually hiring a candidate (more like we had something unique in common). However, this is strictly personal speculation as the recruiter informed me he had no specific feedback about my application/interview style. They have a nice office and the front desk person was also quite personable. I'm not sure if I would have accepted the offer, but for the right personality and person, this place could be a great fit.