Robert was incredibly helpful. Mine was a particularly difficult problem as there was no obvious cause. I suspect others would have given up but not Robert. He stuck it out as we investigated various avenues He came by the house several times to figure out the problem. He did not charge for every visit as he said it was part of the larger job. He was as happy as I was when we found the problem and then he fixed it. All for an incredibly low rate. I don't believe I have ever worked with such a helpful and friendly tradesman. I really felt as though he was on our side. Highest recommendation!