The overall interview process lasted 2.5 weeks and proceeded smooth and efficiently. I went through 5 different rounds: firstly, a fit "speed-date"; then, three business cases; finally, a blended (fit + business case) interview with the Italian Head Unit. The fit interview is detailed and deep-dives your past experiences. It tends to be more challenging than average fit interviews, but less intense than McKinsey's PEI. Business cases are tough and structured, and entail a relevant portion of estimates, and "hidden" market sizing exercises. Interviewers are kind and make you feel at your ease.