Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cannot get it to sharpen. Too confusing to use.

I watched the video on how to use and tried it on a couple of different pairs of scissors. I find it very confusing and cannot figure out the angle to make it work. All of the pairs I tried to sharpen got dents in the blades and didn't seem to sharpen them much at all. Edges are now rough on the scissors even after running it through fast like the video says to smooth off the burrs. Unless you are experienced with this type of sharpener and have used them before, I would not recommend buying this model. Very dissapointed.