A newbie here chimming in on a subject I know a little about. I love Heat n Bond and buy it by the bolt. It comes in a couple of "strenghts" like LITE and HEAVY. The light stuff is great and it is best to stitch it down by machine or hand. But the heavy is something else again. It will gum up the machine needle and it is too hard to stitch through by hand. Quess how I know!