I first completed a quick phone interview with a consultant. He asked me some basic resume questions and delved into a market-sizing questions after that. It was a fairly easy interview. I was invited to a final round interview that took 5 hours in total. The final round interview was mostly focused on presentation, which asked me to forecast revenues for a type of drug. The exercise was interesting, but it was vague and didn't really test my ability to think critically. I would rather walk through a case interview which is more solid and constructive. I did feel that it was a waste of my time.