Unbelievably helpful. I came home after midnight to a broken water pipe with a resultant fountain in the garage and, oddly, a water faucet inside the house that refused to shut off. I called the 24-hour number and got a call back in moments. Because the break was mercifully not in the main house but rather in the garage, it was not an emergency in the sense of destroying the house but I had to stop the leakage. For some reason my brain had shut down and I was having trouble following the lines and ensuring I was getting to the right shutoff valve. He very patiently, despite the hour, stepped me through taking care of the problem, waited for pictures that I texted to him to transmit (they never did) and then took more time to ensure that the problems were under control. Once the critical line was shut off he ensured that I tested other lines, got the faucet that had been running for no discernible reason to shut off, and made sure there was no emergency in any part of the plumbing system. He said that if I wanted him to come out to fix the break I could contact the company to schedule it, but it was clear (and I readily agreed) that it could wait until the plumbers were significantly less busy chasing after real emergencies. When I talked to him about how to pay, he insisted that he was happy to help me out of the situation and refused to accept payment. The courtesy and thoughtfulness and good humor were remarkable. That they were offered in the middle of the night when he had to have been sleep-deprived chasing emergencies with broken pipes inside dwellings was more so. That he did it for no charge: really, I can't say enough positive things about my interaction with him.