I've given it a go and it works brilliantly. This is starting to sound like an advert, sorry, its not intended to be! I was just so taken with the revelatory performance that I felt it was right to share.
Its easy to work on a large scale, marks are quick to lay down and build up. the charcoal rubs out successfully with plastic and putty rubbers, and achieves a good range of marks and tones.
The best thing about this charcoal is the lack of dust and mess, even your hands stay relatively clean.
I also loved the fine points I was able to get and the way that the rubber could cut through the blacks.
The draw back is the cost - prepare yourselves, but it does last very well, I've barely touched the large stick.
Could this be the start of a series of charcoal drawings... I've got so many ideas on the go, I think I will have to stand back and take stock, and not try any more new products!