2 rounds of in-person interviews with Partners and Principles of the firm. All were a combination of personal/fit interviews plus case interviews. Weeks or months of preparation are needed to do well in these interviews, it's very easy to make mistakes which could cost you the offer. The interviewers were supportive and open to working with you to answer the questions posed. HR was good about responding with feedback within 24 hours. Culture was much more supportive than competitive firms even though interviews were with more senior staff.