I bought a roll of this stuff:
http://www.joann.com/pellon-siliconi.../11976487.html
It's the same dimension roll as you quoted and was the same price, but don't know if it's the same stuff. Needs to be quilted 4" apart. It is thin, but the thickness is consistent and I rather like it. It quilts easily, the amount loft shows the quilting and drapes well. I used a single layer. Wouldn't use it on an heirloom quilt, but for kid's draggers or home dec (runners, toppers etc.) it works well. I would make up a practice sandwich, quilt it, and see if you have a change of heart before you discard it all together.