I am giving a 3 star so far becuse the installion instructions are very poor. There are not much details and some of the screw sizes didn't match what was on the instruction book. I also bought this with the 800 watt motor upgrade and the instructions for that are not any better. It dosn't tell were to run the power cable and the spade connectors are to large to fit the motor connectors. The plastic trim that covers the wires underneath only fit on one of the tracks. I tried for a hour to snap them in but where the limit switch wire were supposed to be would not fit.