I have a Fiskar's rotary cutter and mat that came as a set that I got for a gift about 12 years ago. Recently I took a beginning quilter's class and forgot to pack mine along. They provided omnigrid rulers and I personally loved them! The surface of the rulers keep the rulers from moving while cutting and the green color seems easier for me to see the lines as opposed to the orange of mine. It also seems that my rotary cutter gets nicks in the blade real often..which means I feel like I am always changing the blades. There is my two cents worth!