A mold that I've used a few times, and I practice the very strong air. By form, I think, difficult to do it does not stick by cons, even with a lot of butter and flour. So a bit tedious to use because of the small capacity, but must know what you want (no need to take this model if you do not really want the rings). With wooden chopsticks to unmold, I arrive at a good result. I'm happy with my purchase.