I have used the fiskars for 5 years but recently bought an olfa. I love it! The fiskars has a problem with the screw coming loose after using only a few times. I constantly have to keep tightening it. I was afraid of cutting myself so I decided to try the olfa and it's wonderful. And I also bought a blade sharpener so I can reuse the dull blades. Both rotary cutters are the same size, 45.