I have 6 years of consulting experience, working with BCG and a boutique consultancy. My project focus included business strategy, organizational governance & competitive benchmarking.
While at INSEAD I was VP in the Consulting Club and interviewed with all MBB.
Beyond case essentials, I think it's important that candidates perfect the fit part of the interview. In my experience, interviewers are more forgiving in the case if you make a strong first impression. Consulting is a people business and creating good chemistry is one of the essential soft skills necessary to succeed as a consultant.