I wish that I could share the same experience, but I cannot. I called on 01/02/15 with a tankless water heater problem (no hot water). The plumber we spoke to, said we needed a new unit without even seeing it, which immediately sent out red flags to me. To top that off, they could not even come out until next Weds 01/07/15. We started to tinker with the unit ourselves & had water gushing everywhere. So we called Saturday around 5pm with an emergency. I asked to please have someone call us asap and the dis-interested person took our info & hung up. Needless to say, no one bothered to call or come over. We finally stopped the water ourselves and called Lawson Family Plumbing the next day. They responded immediately, and were able to diagnose the problem (a faulty heat switch) & gave us some hot water until the repair is complete. We are waiting for the part to come in which they will install. I can't say enough about Lawson Family Plumbing & a BIG thumbs down for Copperline.