Insituform has been a proven method of relining sewer mains for quite awhile. I don't have any information about using this procedure on small diameter home laterals and I assume that's what you're inquiring about. Can you provide details on what they are proposing to do?

Thanks. A plumber proposed this for part of my main sewer line, which runs under a deck and pool equipment. But after that it runs down a slope under my neighbor's property. I've concluded that a more conventional trenchless repair is a better way to go.