Disappointed.  It cannot punch through light cardstock at all.  Even after I punched through a sheet of aluminum foil a dozen times, it punched through looseleaf paper raggedly, roughly, unreliably.  I had trouble pulling the puncher out of the looseleaf paper after making a hole!  Messy holes.  I expected better from a Fiskars product because they have such a long and stolid reputation for their cutting tools.