I originally bought a Juki with the Grace Stitch regulator, and I now have a Bailey with a stitch regulator. I couldn't imagine trying to quilt without one -- with it, I was able to practice for just a little while (a pantograph, so basically the same pattern over and over), before doing my first quilt. With the stitch regulator you still have to try to work at an even pace, but it gives you a lot more room for error, and the results end up looking a lot nicer.