The only one I've done did not end up being a block I would have chosen, but it was a lot of fun to follow through with the process. It made a great donation quilt. I have also created a mystery quilt similar to a block I do really like. I've sent the clues via email and taught it in a class. Everyone seemed to really like the results. One friend has made it twice and won at quilt shows. That was even more fun for me.