The process took more than 3 months. The interview style depends on the interviewee. Can be very easy or stressed. You don't have to be perfect on your case to get in.

Overall, you'll have 2 rounds case interviews. first round will be 2 engagement managers; second round with 2 partners or associate partners. The case will be more ops (mfg, scm, etc.) focus compare to other track (generalist for example)