I just got home and put tires on two of my cars and this product exceeded my expectations. It was quiet, fast and precise. The built in gauge matched the computer gauges on both of my machines exactly and I did it in less than 10 minutes including opening the box and taking out the product for first use. When I was done all the hoses and cables fitted perfectly and now the unit sits on a shelf in my garage. This product feels solid after first use and another great feature is that it works with a charger/cigarette lighter port. worth your money! Don't forget these steps! 1. The air compressor only works with DC 12V. 2. Please start the car before you turn on the air compressor. 3. Please turn off the air compressor and cool it for 3 minutes. after 8 minutes of continuous operation.