While visiting my daughter in San Diego her house suddenly started leaking from several places under the kitchen sink. I blindly called plumbers and Black Mountain was the first I could reach at 7:30 in the morning. The answering service said they would call back. Within 15 minutes they had called back and they were here in about 90 minutes. The job was complicated so the gentle called his supervisor and he was here in about 15 minutes. He did the complex part of the work in about 10 minutes and the first plumber finished the rest of the job in about two hours. Both gentlemen were great! The price came in at the lower of their two different estimates. And what they charged was quite reasonable. The job was difficult because whoever did the original installation didn't even have it up to code. Now it is, and it's perfect. I highly recommend them. In fact, if they had a branch where I live, Fresno, I'd call them instead of my usual plumber. But I'd bet they're among the best in San Diego.