I think they're lovely, but a pain in the arse to knit! I didn't like constantly spreading the "yarn", to find the edge. I actually haven't finished mine yet. Just can't get inspired to pick it up.
When Rowan made the kidsilk creation yarn for a similar type scarf - that was a fun quick knit. The Sashay yarn is 1/5 the price, but takes 5 times as long.