I thought the problem of cutting up my ruler was b/c I was a new quilter and a lefty! The ruler that I cut up is the Shape Cut (I think--I am not at home to check as I am on vaca) I have had a hard time getting the cutter into the slot. I do use the Olfa with the blade switched around to the opposite side so I am not sure that the Olfa is the issue. I agree with the person who said she thought it was too flimsy so I am going to write to them also. They need to know that their product is inferior...