I love the Martelli ERGO 2000. I have the 45 mm & 60 mm, but use the 45 the most. I have a drawer full of Olfa and fiskars and they are good, but I find after a few hours of cutting my hand was hurting. I never have that problem with the Martelli. Some of my friends had problems at first getting used to using it, but once they figured it out they haven't used anything since.