Bests & Worsts Reviews from Amazon

I purchased this sharpener for classroom use because it was quiet and touted to be extremely efficient in the classroom. One month after beginning use, the sharpener stopped sharpening on one side. I returned the sharpener to the company and was sent another in the mail. The second sharpener never did sharpen on both sides. I tried every pencil in the drawer, some old, some new, various brands, with the same outcome: 1/16th sharpening on one side and full sharpening on the other. I contacted customer service via e-mail and was told the problem was the PENCILS. (Their studies show that many pencils are inferior and dry unevenly, thereby making it impossible to sharpen them.) I then tried other types, brands, etc. No improvement. I finally tried colored pencils, and notified the company that the sharpener would only sharpen colored pencils. They notified me that I had invalidated my warranty by sharpening colored pencils and they were off the hook. Shortly after I notified the company a second time, I received a very nice e-mail from a company problem solver who settled the problem by sending a Super Pro 6 model. It has two sharpening blades and works beautifully. I suggest you pass on the Quiet Sharp 6 and purchase the Super Pro 6 model to begin with. The dual sharpener solved all problems inherent in the Quiet 6.