This product works exactly as you would expect! It took a few tries to get over the learning curve, but once I figured out the correct angle, etc., it worked like a champ. I find that its easier to frost, use the comb to go around the cake once, and then refrost the areas that were a little too thin the first time. Then go around the cake with the comb again. Also, if you hold it at an angle rather than perpendicular to the cake it makes it smoother. I used it on a three-layer cake w/ filling in between each layer, and it was plenty tall enough. The only reason I gave this product 4 stars on Amazon is because of the price. I bought this item at my local Ben Franklin craft store for $1.69 (and that store is usually higher-priced).