I have been looking at these for years, but never made them until this month. I think watching the Great British Bake Off has emboldened me to try these fussier cookies. And they are indeed fussy. The dough is a bit on the dry side and somewhat hard to work, and getting the two colors even is tricky at best. I think they look okay, but I wonder how many times they had to try them in order to get the perfect pictures in the book.
Then, I have to say the flavor was a little disappointing. I thought the chocolate would pop a lot more than it did. That could be the chocolate I used in the recipe, though, so your experience might be different.
All in all, fun, but not as amazing as I hoped.