After reading all of the negative reviews and some positive, I decided to try this sharpener. The cost is low and Walmart's return policy is a no-brainer. In comparison to my manual sharpener, this electric sharpener is awesome. I'm sure there are better (and more expensive) sharpeners out there, but this one is great for my needs. I sharpened about 30 knives in about 20 minutes, and they've never been more sharp! I agree with other reviews that this sharpener lacks power, but as long as you align the blade correctly in the slot, this won't be an issue. It may, however, be an issue as to how long it holds up. I found it more productive to slip the blade in the slot and pull it through with no downward pressure other than its own weight. This kept the speed of the motor constant and allowed the blade to align itself. Both cheap and expensive knives were sharpened perfectly. Many were serrated (including the so called permanently sharpened "Ginsu" knives...ha!). This was not a problem, although with repeated sharpenings I can foresee the serrations being honed away. I'm very happy with the overall quality and price!