All aspects of my purchase were truly outstanding. Website product information, price, shipping and product quality all exceeded my expectations. As for the Sevor servo motor, It was easy to install. It is light weight yet powerful. The controller enables me to operate my Juki DNU 241-H sewing machine at speeds between a crawl and very fast stitching. Even at a crawl, this motor has enough torque for the needle to penetrate many layers of marine vinyl. The instructions are adequate after some study. Also, the needle positioner works perfectly. Don't hesitate to replace your heavy uncontrollable clutch motor with the Sevor 750watt servo motor. The difference in controllability is night and day.