Very easy to practice, very similar to their practice case. I followed a similar outline to the funnel they used for market sizing, at least. Most graphs they show are very interpretable and very epidemiology-dependent.

Very hard offline process with 2 rounds of case round and 2 behavioral rounds. The case rounds were of 1 hr each where 30 minutes to solve the case and 30 minutes to explain it to an interviewer. Behavioral rounds were more of guesstimates and puzzles