Creative grids rulers.
I like the non slip back on all the creative grids rulers as I broke my arm and then had shoulder replacement and my arm is not back to normal.. it's been a year and a half and I was unable to hold my old rulers without them slipping. With the creative grids rulers I can actually accurately cut fabric again. The only thing I do not like is the extra quarter inch all the way around. I guess that's just a matter of getting used to it.