When I learned how to decorate cakes 30 years ago, I leaned from a man at the little nearby cake shop in Glendale, who was a great decorator. He taught the Kellar method of cake decorating vs. the Wilton method. I do not think that this method still exists. One of the main differences between the two methods is the way of making icing roses. The Wilton method teaches making roses on a flower nail. I make roses on a wooden dowel, and remove them with a pair of pointed scissors. It is ten times faster and easier than using the flower nail. I'm sure there are other things that I do differently too. Wilton has always had a monopoly on the cake decorating business---doesn't mean they're always the best.