I love the Martelli rotary cutter, but I have found that unless you use it with THEIR ruler, it wobbles and doesn't work as well. Needless to say, I don't like their ruler - or haven't figured out how to use it yet. When I have to cut lots of strips the same size, I tend to go to my June Taylor Shape Cutter Plus (has groves every 1/2"). I'd have to fold the fabric so many times to get it under the Martelli ruler that I doubt I'd get it folded without creases and wrinkles. However, I LOVE their cutting mat - the only one I've used since I bought the system.