I must admit to being incredibly stupid or incredibly brave as I completed the MDS in 2003.
Fantastic experience.
An even better one is the Kalahari Augrabies Extreme Marathon - same format as MDS.(
index). I did it in 2007 (badly) and am going back again this year.
You may have seen on the forum that I keep trying to promote it. Yes the organisers are friends and yes I am their UK agent but the main reason I plug it is because I love the event.
As I am not very brave I must be incredibly stupid.