I am slowly switching over to just a few Creative Grids rulers because I like the less slipperiness of them so I tend to use the same anyway. I find that between slowing down while I cut, shifting my holding hand up carefully and using them greatly increases my cutting accuracy. All those people in the past I watched swoop their rotary cutters up so quickly really weren't being good role models - at least for me. It's a wonder more people don't cut themselves.