The first few times you use this cutter on a big stack of paper or cardstock, you're going to feel like Superman. It cuts so easily and so cleanly that you'll be tempted to show it off to your friends by taking slices off huge phone books!One serious caution, though: in my case at least, the back bar wasn't at a proper right angle to the blade, so I couldn't use that and had to rely instead on the gridlines marked on the base (which *are* sufficiently perpendicular). I keep meaning to try loosening the bolts that hold the back bar down and trying to tweak it, but I still haven't gotten around to it.