I have. I started using it on machines that have one, after a new puppy decided to be good and go asleep on my feet. This meant when I was sewing she sometimes put her head on the foot pedal when my foot wasn't there buT the machine was on. She still enjoys making the machine go. If I am using a foot pedal she waits and loves walking over it now.
I love free motion quilting with the stop start button and a set speed. Tog in with you still find yourself hands and feet, a little like learning to drive. It soon calms down and I love it.
No loose lead to the floor and much safer.