I like the sandpaper dots because they are flat and allow the ruler to still hold the fabric in place. The clear dots are taller so when you make a cut the fabric can and does move causing problems. I really like the creative grid rulers, they have their own rough spots already on them. They don't grab the fabric like the sandpaper dots, but I do like the rulers. Took me a little while to get used to them, with 1/2" on one side and a 1" interval on the other so you have to be careful which side you are cutting from. You know the saying "measure twice, cut once"!