I treated myself recently to the Cat's Cradle ruler. I've always loved that block but it is not easy to do. The ruler makes it very easy with perfect results. I gave away the Twister. I didn't like that the quilt couldn't be done in blocks or some order to make it easier to deal with smaller sections. Had to get out the whole piece to add on to it. Just not what I enjoy doing. I've always been cheap about buying quilting supplies but am cutting myself some slack these days.