Now that you are hooked on Olfa products, here is a suggestion.
Save all those dull blades. When you have 5 or 10 you can exchange them for NEW Olfa blades at: http://www.houseofhanson.com/lpsharp.html
This is the 2nd year I have done this. Mail them with your check, and you get new ones back pronto. No return postage charge. There are other places to buy new blades, but I like the idea of recycling old blades. We don't need those in the landfill.
Go Green!!!!