I won't piece without a built in walking foot/top feed dogs. So my machine is a Babylock Serenade (love it, lots of features like knee lift for presser foot and hands free appliqueing, thread cutter). This machine is large, not one to pack up for classes, etc. My backup machine is an older Pfaff Tiptronic, which has the built in walking foot/upper feed dogs, just no knee lifter for presser foot or thread cutter. It's a smaller machine, easier to move around.