I have a severe condition ( RSD) in my left wrist arm, and hand which hinders my using a rotary cutter well and without strong discomfort. I have found the Martelli cutter to be the best for accuracy , comfort and longer lasting blades. I have used other brand of blades, but Martelli blades seem to last longer and are sharper in my opinion. Every condition is different, however. And that is why we have choices.........thankfully
