Great topic! I am just finishing a quilt with straight line quilting. It has turned out fine, but there are a few places where I'm not happy. I think it will be fine once it's washed. I used my satin foot as someone has mentioned and increased my stitch length to 4. I also kept my machine at the slowest speed. I have a walking foot but I haven't used it yet. I'm going to get it out and practice with it before I do my next one! lol