I bought my Bullseye Leak Detector a little over a year ago. This tool has surpassed all of my expectations. Most of the tools I buy don’t live up to what the manufacturer claims. This is not the case with this leak detector. Our shop has found countless leaks that there is no way we would have ever found without this tool. For example, porous gas tanks, porous intake manifolds, and porous wheels. We have found A/C leaks that we have been unable to find for several seasons in just 20 minutes! I only wish that I could have had this tool 20 years ago, it would have saved me a lot of money and aggravation.