I have used them, and I like them. Some folks say that they are thinner than some of their other batiks, but I think that the weight of batik varies even at my LQS and the CT are no thinner. As far as colorfastness, I think all fabrics need to be washed, regular cottons for shrinkage and the batiks to remove any excess dye. I would wash any saturated colors for sure no matter where I purchased them.