I have had the 60mm Olfa for many years and love it, though I had recently had issues if I cut too long. I bought the Martelli when they had a sale (I want to say it was 50% off) and I am still getting used to it. Definitely follow the directions about finger placement because the Martelli has a mind of its own if you don't. The Olfa is easier to use the first time and You can get them on sale at JA's frequently.