I make stainglass patterns where you need yds of black 1/4" bias, burned my hand too many times making it the old fashioned way, so I do have 1 in that size, & use it for stems in my applique also. It' s easier too iron & don' t have to get close enough to burn your fingers.
I don' t think I need any other size & unless a great sale price probably would onky but the size to make binding for a quilt. I'm about to make binnding for a king, i' m sure it would speed up the process.