It was gruelling. 4 person 'Panel' with one, at least, .external'. Simple directions and easy to get through, if you know the answers off top of your head. Makes answering practical things difficult, if you are not versed in expressing it vocally/ for example things that you may do at an 'unconscious level'. For example, think about explaining how you 'change down gears' to Stop (if you drive). I had a bit of that. It was a fair and frank process.