We tried both the muffin pan and the rings.
We used the recipe from Martha Stewart. She has a great video on line that we thought was very helpful. It was sometimes a bit challenging to find it but if we could locate it on youtube under layered yeast dough or Kouign Amann.
We thought it was successful but I think the next time I would try wet yeast instead of the powder just to see the difference. I also thought the rings worked wonderfully for this because the dough could flatten out and got crispier than the muffin shape. I also thought the apricot jam really added to the flavor.