I haven't bought their mystery box, but I have bought fabric from them. It has always been very high quality fabric. I would think that you would be getting an assortment of FQ's that they don't need for their projects anymore, but I would think -- since they're coming from a pool of high quality fabrics -- that you will like the quality of the fabric. Whether the patterns/colors appeal to you will be strictly luck. However, since they do this fairly frequently (selling the mystery box) I am thinking the fabrics would be pretty up-to-date. Trust me, if I had the money, I would buy one myself!