This is the best paper trimmer on the market, in my opinion. I am a paper craft tutor, and have now bought around 12 of these, for different students, after they've used mine, and see how simple it is to use. It is accurate, the blades last for ages, especially if you turn them round...I have a tendency to cut in one direction, this prolongs their life. I have large and small guillotines, and various other cutters, this is the only one we have found to be easy to use and accurate, as well as light weight for carrying to classes. It is primarily a paper trimmer, unsure of its durability cutting other products like thin metal etc, although I have cut thin rigid plastic easily.