I've got a sample of it and I highly recommend it. I really love the Artbar! The pigment load is very similar to Daniel smith watercolor sticks except the artbar readily releases the pigment in dry form.
It's unlike other crayons since it easily dissolves into watercolor with no marks left on the paper. If you still want texture then put a teeny tiny amount of water. The crayon on wet paper comes out to become a beautiful stroke that greatly resembles opaque marker.
I would recommend this over the daniel smith watercolor sticks and the caran d'ache neocolor. The artbar doesn't have the sticky, waxy (resistance) feeling that both caran d'ache and daniel smith has.
Really get it!~
I'll post a drawing when I get to them.