I don't have any of those items and don't know anything about them. So I would want to know how the ruler is different or better than the typical 24" acrylic ruler and if it would help me get more accurate cuts. Similar for the rotary cutter, how is it different/better than the standard 45mm Olfa cutter? I don't have a blade sharpener so would like to see it in a demo and tell me how much it would save me vs. just buying a new blade when needed.