I usually purchase all of my backing from Fabric.com and more. They have really great prices and 90% of their fabrics are really nice. I have been disappointed with a couple of pieces and they told me to keep it and donate it or something and, once returned my money and the other sent me something else. GRWAT customer service. Their batting prices are good too. And it does not take a large order to get to free shipping - $39 I think.
I have never been displeased with anything that I have purchased from them. And they are extremely helpful ifyou have any questions. I ask for some really specific measurements of a pattern and they even sent me a picture and showed me where thevarious measurements came from.
Five stars from me for them.