I first went through a phone interview and got invited to superday the next week. The phone interview was with the office recruiter. She just asked questions about my resume. I go to superday and go through three interviews. Interviewed with a manager, director, and partner. I did not expect it but the interviews were more conversational. I would suggest trying to show your qualifications through the conversation. The partner was the easiest interview. We talked about countries we visited and we talked about his kids.