I was surprised at how easy it was to use and it drew vacuum in my 1990 VW Vanagon with no problem. The coolant hoses under the radiator were crumpled and it was sucking in coolant. First time using such a tool and everything went very well. To be honest it was so easy that I was very afraid of missing something or screwing something up. So far, so good! This tool is great if you don't want to make a mess and cut down your torturous time so you can spend more time with your family ;)