However, a star I pull off because of poor quality. The sharpener is not sharp enough for a satisfactory result to the peaks and is not interchangeable. Here the main focus on the (original) was steered idea and not on the quality of which is a shame because the sharpener is not really to use so.
My conclusion: A really good, funny and original idea! A product which is like giving away and what makes it fun. But if you're looking for a good, reliable sharpener, there are better products for significantly less money.