I have used it with great success. Took a long time to try it, but finally a while back used it first on my own home where I had a slow (add a little every year, under ground lines..30 + year old unit.. etc) leak. Has been perfect for 4 or 5 years now. I have a H10 that will find just about any leak, but can't always get to every spot, so if the leak is small enough and inaccessable.... the can goes in. Not a failed unit yet out of about 10 in last 5 or so years.