I have a couple, but by far my favorite (in all sizes) are the Martelli Rotary cutters. I use the large one when cutting several layers (more than 4 or 6) because it will go faster. Also when cutting thicker fabrics, like fleece, minky, etc. Takes less effort, blade sits deeper on ruler so I feel like I am not struggling to cut those bottom layers. I don't use it daily, but a great tool in my arsenal of too many gadgets! lol