My ancient water heater was giving signs of going out, so I called Home Depot to buy a tank and they set me up with Fast to get it installed. I had called in late afternoon, but they were still able to get me next day service, and they arrived right when they told me they would. My tech, Chris B., was incredibly professional, and helped to explain clearly about regulations, safety, and options in installing the heater; he is clearly a gentleman who knows his job inside out and backwards, and though I knew nothing about plumbing or hot water tanks, he was patient in explaining it to me. Mine turned out to be a difficult job where the installation was full of problems, but Chris was incredibly courteous and professional throughout, even though it took him a couple of hours extra due to issues with the exisiting configuration, and there was no additional charge for his "extra" time.
I highly recommend FAST. I'm very pleased with their product, and their customer service was excellent from start to finish.