I have about 5 sizes because everyone I know raved about them, so I bought the "whole family." I've been able to make the 1/4 and 1/2 inch ones work somewhat on shorter runs of fabric, but mostly I find all the sizes troublesome. I've read and reread the directions, looked at the Utube videos, etc. but I still find the things hard to use.
It's much faster for me to just just make bias tape by hand and iron without the Clover bias tape maker.