Poor Service, Overpriced, and Incomplete Work
I had a disappointing experience with this plumber. A few days after he performed a descaling on my tankless water heater, an error code appeared. When I called him, his immediate response was that mechanical parts fail. I asked him to at least come and inspect the unit before making that determination over the phone, but he said the earliest he could come was four days later and "this is not on him". Eventually I learned that the annual service should include both descaling the heat exchanger and cleaning the filters, which means the service I received was incomplete.
On top of that, the pricing was not transparent. He initially quoted $99, but when he arrived he demanded $175 + $75 for placing the ScaleCutter.
Overall, I found the workmanship poor, the customer service dismissive, and the pricing unjustified.