First call is behavioral to see if you are a general fit for the role. Second interview is a case study with a manager. I was unhappy with my performance there, but the interviewer was more focusing on how I work with feedback, than on my immediate results. Third round was in the office to see if we are a mutual fit. The process is "easy" in the sense that you get to be yourself and see if it works. I answered a few questions with "no" or "I dont know", but that was fine because they are looking at the bigger picture. Overall a very transparent interview process where all my questions were answered and I felt as though I got a realistic perspective on the role.