I have done about 6 mystery quilts. Most of them I had a great time doing. They were done in my church quilt group and usually the person who selected the mystery has made it first to get all the bugs out and to help guide us a little with fabric and color choices. 3 of those were Debbie Caffrey patterns. I have never done one online on through a shop. One year I selected the mystery and made it into a queen size quilt. It is fun when you doing it together as a group, we would be gathered (about 6-8 of us) in a room at the church experienceing this together