We started having a really nasty knocking sound when we turned off the water in the main bathroom. We called Las Vegas plumbing because they were recommended very highly by one of our friends. Steve came out to assess the situation. He let us know that two men would be needed to come out the next day to go into the attic to do the work. Sure enough the next day to men came out. They spent about an hour in the attic assessing the situation. They realized that the noise was coming from inside the wall rather than in the Attic. They would need to open a large chunk of our wall in order to do the repair. Because we are planning to paint in about 6 months we asked if we could put off doing the work for 6 months. No problem they told us. Because they didn't do the repair, they did not charge us despite the fact that they were about three man hours of work put in already. They were punctual, honest and a pleasure to deal with. They have a customer for life.