I use Walmart fabrics all the time. Like others have said, you can get great fabrics there and you can get some pretty thin ones. I was just there yesterday for some interfacing and found 4 bolts of fake suede in beautiful colors for $10/yd. I thought that was a very good price/quality, although not something I would use for a quilt. I can't normally afford LQS prices and JoAnn's is an hours drive.....so Walmart is my "goto" fabric shop!