Interesting that Tommi says that the people who've tried them also use standard watercolour pencils.
Re-positioning as a 'new' product catering for a segment's 'special needs' is the oldest trick in the marketing book (I did and taught mktg). Best UK example is Lucozade, once the recuperative drink of the ill and infirm (bought in chemists), then re-positioned as a glucose boost for the fit and healthy; similarly Complan was re-branded and re-positioned from a negative food to keep the infirm alive to a positive diet aid (funnily enough, both entailed price hikes).
NO doubt the price hikes were to pay for the Marketing Executive salaries and the extensive re-branding Marketing and Advertising Launch.........
....I was involved in both Marketing and Advertising in my Career.....so much ********....but that is what makes the world go round....
Keith