This is very interesting - would like to find it locally instead of on Amazon to try it. When I embroidery on T-shirts I use an adhesive stabilizer so there is NO pull. But I can see where it would be wonderful for HSTs and even in embroidery. But when I use embroidery on a quilt I use a cut-away and leave it the size of the bock, I have found it gives it a bit more strength and it won't curl under after being washed.
I am a little concerned it is not carried by quilt shops and there fabric stores. But it is worth a try. So guess I will order it on Amazon and see what happens.