I went through all three rounds of interviews and I didn't hear back! I thought they ghosted me, but then I got a generic email four months later saying they chose another candidate. The interviews themselves were fine and what I expected, but the absolute lack of follow-up for a final round candidate was very unprofessional.

Simple one-step 3:1 interview with the director and two senior associates. Conversational mixed in with one or two behavioural questions. Asked about coursework and goals for the future. Made feel very at ease.