The unit needed some assembly and did not come with any instructions but it was pretty easy to figure out. I had to trim the plastic silicone tube between the lift unit and the control unit and then I had to heat the end to properly slip it over the connector. When I went to test the unit the fitting on the input (green) side leaked. I unscrewed them and applied some thread tape and then reconnected. After that I tested and no more leaks. The only other complaint is the rubber hand grips slide right off so I will probably have to glue them back on with an adhesive. Other than that it does lift the car in about 5 seconds!