A great product that doesn't cause the cake to stick or cook unevenly. It can be fiddly to use as the cake is cooked as 2 halves so you need to balance the spheres on the rings provided which can be difficult to keep straight when moving into the oven. Other brands I have seen have a base fixed so that they don't need to be balanced or levelled. In saying that the cake design is very forgiving for uneven halves that still give you a perfect sphere.