I know Arno as someone who does not shy away from a difficult problem, but grabs it with both hands and turns it into an opportunity (such as tjil.nu). Additionally, he is honest about the struggles that come with it and can put difficult subjects into words. You do not always see that honesty/openness in our favorite internet gurus and it is refreshing.

That’s why I think he is an excellent personal mentor for anyone who is dealing with a difficult (business) problem.

— Arjen Stens, Blackriver Tech