I have used the Legacy Studio muslin from JoAnn. It feels nice.
It does shrink - at about the same rate as most of the other quilting type fabrics do.
Just a question/observation:
Why do people not seem to blink at the cost of a yard of fabric at a LQS - but seem to feel that they are being robbed if JoAnn charges the same for similar quality fabric?
(I remember people from "the older generation" going on and on about what things cost when they were younger - I am now a member "of the older generation".)