I love using the start/stop button! Because I am unable to use my foot for the foot pedal, I would have to use my hand to push on the pedal on my old machine. With my new Pfaff, I am now able to keep my seams straighter and now working on my free motion skills! Was not able to free motion with one hand on the fabric and one on the foot pedal! I'm good, but not that good! LOL!