I think, perhaps, those who have trouble with their needles or puckering are using too thick a line of glue. The more times I used this Elmer's School Glue system, the less I used until I ended up with a very thin line. You don't have to worry about making a mess that shows, just wash it when you are done with the entire quilt and ALL the glue, visible or not, is gone. Ironing is important, although I "iron" with my hands, from the center out, as I go along.
My first time I used it I was doing a pictorial with thin (about 1-2") lines and I got glue all over. It washed out when the completed quilt was laundered. I'll never use that toxic stuff again!!!!