I have bought a couple of fabric from my Wal-Mart. One was light for a changing table pad for my DD's baby doll. It was the quality from other fabric stores (not LQS though). However, I did buy some heavy fabric for some curtains and I must say I was impressed. It was just $7/yd but durable. However, my store has several colors but nothing that I like...lol. Nice size selection, but poor choices, at least to me. They do not carry Minky or anything related. I have gotten some interfacing from them.
As for the service, I always have to have someone call for someone to come cut it for me. I can never find them in the sewing department.
