Today's fabric is very often a lesser quality. In the last 20 years of working in a fabric store, I can not believe some of the changes. This has been done to keep costs down (and even at that the cost has skyrocketed). But, most often, today's quilts are not heirloom items. While we hope our quilts are cherished and treasured and will be handed down thru families, this is no longer the case. I am thrilled that my kids have kept their baby quilts (the girls even took theirs with them to college), but other quilts they have outgrown, changed their tastes, changed their home decor, etc and the quilts have been passed down or given away. This is ok, I know they have been loved when they were used. Because of this, I am not as concerned with the lesser quality fabric. It is also one of the reasons I machine quilt instead of handsew my quilts. Having said that, trust your gut. If a fabric feels real thin or funky, do not use is. Throw it in the box used for trying out blocks or stuffing toys.