I have been using JoAnn's best/highest quality muslin for years and LOVE, love, love it. It is crisp and dense enough to compare favorably to quilting cotton. I have bought it by the bolt. Their "best wide back" is not quite the same but I have used it often and not had any problems. I always to a quick finger test to get a sense of the quality and then hold it up to the light to see what I can see through it. I even lay a corner over a piece of dark fabric to see if I can "read" the pattern or color through the muslin. I have found a variation in quality even under the same label information. But to use a good coupon on a bolt of something I use often, it is worth the fuss.