My dear husband surprised me at Christmas with a ton of Martelli rulers, the Martelli mat and the Martelli 45 rotary cutter. It took a little practice to learn to use the Martelli cutter but now I love it so much that he bought me the 60 and it is even easier to use. BUT...I got a HUGE lecture last weekend when he found the cutter on the table without the safety cover engaged. It's too easy for me to lay the cutter down and forget that it is there and as he said, would be very easy to seriously cut myself. That is the only problem that I have with the cutter and it's a user issue instead of a product issue. If you use one, remember to always engage the safety cover because it is so easy to lay the cutter down in a position that could really hurt someone. That being said, I LOVE my Martelli rotary cutters!