I've got one. It works fine. The only time I didn't like it, was when I was filling the completely dry lines in my '49. It took forever! BUT, its fun to use on lots of things, like checking your vacuum advance, sucking gas up to the carb and other fun stuff. When I've used it to bleed brakes in service, it works much faster. I also work alone in the shop, and it sure is nice not to have to find someone to sit in the cab.