Well, there's not much to review about it. A stack paper cutter operates a lot like a normal paper cutter. It has a flat area to the left that is where you set your originals and line them up. Then the cutting blade is to the right with a lever attached. There are two important differences between a stack cutter and a plain old paper cutter.
1) the stack cutter has a clamp that holds the stack tightly, so the stack doesn't move while you cut. This way you get nice clean and straight cuts every time.
2) the stack cutter has a very heavy duty blade made to cut through hundreds of sheets of paper at once, rather than the 10 to 25 sheets cut by normal paper cutters.
As for the amount of force required to use the stack cutter, it takes a good amount of pressure to cut a typical paperback's binding off. But the cutting lever is long and gives a good mechanical advantage. I would bet any normal adult (assuming they don't have any hand / wrist / elbow / shoulder problems) could do it without a fuss.
The stack cutter I bought from ebay came from China, and the instructions were in Chinese. This wasn't a problem because it was pretty obvious how it worked. The cutter comes unassembled, but that was no problem either. There are two bolts that go through the blade assembly that hold it onto the flat paper-line-up area. Lastly, you slide the cutting lever (basically a pipe with a rubber handle on it) onto the cutting mechanism - easy peasy.
