I'm an ex-McK consultant with previous internships at McK and Roland Berger. 
I still remember the first "case-interview" I had with an ex-consultant at a Start-up. Never having heard of the term and being utterly unprepared I failed miserably. Only months later when I prepared for consulting interviews I realized what "cases" are and learned step by step how to approach them. The rest is history. 
The experience showed me that cases can be learned, even if you start at 0, preparation is key, and there are shortcuts to learning it - if you have someone who can teach you.

I am now here to share with you what I have learned along the way so that you are successful even on your first interview. 

As a coach I am a shortcut, the drill to perfection or a second opinion