Yeah, the JC Penney has shuttle shift and it works great.
Over the years I have bought, and had some Simplicity built machines given to me, because people couldn't get the belt adjustment figured out. I like the shuttle shift system.
I plan to pick up a tube for the rear tire today. The oil is black as tar so I'll change it as soon as I crank it again and warm the oil. Then I can ride some more.