We had a problem with the first unit delivered. It was returned without hassle. A second one was delivered and works perfectly. It is convenient, easy to use, and both of us feel the benefit of using it. The power cord is about 4 ft so we use a 6' extension cord for our convenience. The unit is well built and works as advertised. The size is easy to move about, the motion provides us with good leg action. We will probably buy a second one from this supplier.