I am making walnut countertops for my kitchen. I bought it based on the good reviews because really what else can you do? The set also contains all the nozzles that I use most often. The $20 price is amazing for 6 high quality bits as I usually spend $30-$40 on one bit. I've used the large curve extensively on hard black walnut. It cuts smoothly and effortlessly without burning wood unless you "stand" in one spot for too long. All cutters will dull over time.