I have purchased a few Autool tools in the past and they have been of good quality and quite useful like this manometer. I had been looking for a digital vacuum gauge to use on my vehicles for awhile and I decided to give this one a try. I have not been disappointed. This vacuum gauge works beautifully and I would highly recommend it. The tool has a nice feel to it, it is very responsive to engine vacuum changes, and I like the ability to be able to record readings and then review later. In addition, you don't need to get a loan to purchase this tool.