Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Not worth the money and I got them on sale

I purchased both the 5 piece set and the 6 piece set so as to have a full range of sizes. Based on the advertising and the comments these bits appeared to be just what I needed. Very wrong. The bits work very poorly. How do I know? I have a set of glass and tile bits made by Black & Decker that blow the Yukon bits away. In the same tile, with the same drill, the B&D bits cut a hole twice as fast and they only have two edges. The Yukon bits could barely get through the porcelin tile I was working with. I finally resorted to using the B&D bits up through the largest size and then finished off with the Yukon bits. And that is the only advantage I can see for the Yukon bits - they come in larger sizes than I have found the B&D bits. If you do not need the larger sizes go with the Black & Decker bits.