Don't try to do 15 sheets at a time--it'll get stuck. The rubber grip is nice on your hands but I don't think I would choose this again because I've had to rip pages out of it a few times already.
It is comfortable to use doesn't hurt your hand as you press down. Put in less than the max limit and the cutter jammed on me almost ripping the paper to get it out. Decent bang for your buck though.