Review (5/5): worked well
I took a cooking class in France and this is where I learned about these rings. I used them in a lamb dish where the shredded lamb and veggies are pushed into the ring and then topped with French mashed potatoes. I lined them with parchment paper. The rings slid off the paper when the baking was done, the parchment paper easily unwraps, and my dinner was elegant.
I wish they were a little taller, but I'm happy with them.