The first round was an easy behavioral phone screen. Then the final superday consisted of 3 interviews - behavioral, case, and critical thinking. For the case, they gave you a company beforehand to analyze and basically just describe to the interviewer. The HR contact was really nice and helpful throughout the whole process.

Applying to Key was rather straight forward. Started with a online resume submission, was followed a few weeks later by a behavioral and fit phone screening that lasted for half an hour. Followed by a superday a week later. Superday consisted of three half hour interviews: case study, behavioral, and quantitative reasoning. Case study prompt was very open and given a week before the superday.