I’ve been looking for an elusive leak in a vinyl liner pool for more than a year. I purchased the VILO, went back to the pool and found not just one leak, but two! One was behind the light and the other was a pinhole of a leak in the liner itself. The equipment paid for itself within a couple of weeks, a big difference using it compared to how I did it before. I couldn’t be happier, it’s well worth the investment.