I use my 6 X 24" ruler every day.....I wouldn't know how to cut fabric WOF without it....get those little rough dots and put them in 3 places on both sides of the ruler and it won't slip while you are cutting with it....also, press down hard on the ruler, cut halfway up and then move your hand up the ruler and cut the rest of the way. I think the only ones I don't use are those triangle ones.