Pretty standard interview process. First round was questions about myself, a few behaviorals, and then fit, though I did get one "think through a situation" question. Super day was composed of a number of technicals and brain teasers interspersed with behaviorals and fit. Everyone I met was great, from the interviewers to the recruiters, who were SO LOVELY, especially compared to some other firms' HR people. They were all really easy to talk to. I'd say focus on making it a conversation instead of just trying to answer questions and get out. I had superdays with JP and Goldman as well and didn't have half the experience I did at MS, so definitely get to know the people! They really are the firm's biggest asset.