I have owned my boiler for 6 years. It was put in as a replacement for a boiler that was installed in the early 1960's, when my house was extensively remodeled. Since its installation, and the subsequent zoning (with thermostats) of my house into 4 zones, I have saved a considerable amount of money on my energy bills. The boiler is very quiet, it is right below my bedroom and I cannot barely hear it running despite it being mounted to a wall that was constructed specifically to hold it in place. I have not had to repair anything on it, it has not failed yet despite several winters that were incredibly cold and windy. As it is a high efficiency boiler, it has both an intake and output vent on the windward side of my house, and neither of these have clogged with snow, ice, or any other substance during winter. I especially like the fact that it is a variable-output boiler, meaning that once the water is up to temperature, the burner does not operate at 100%, it reduces its output and generally only replaces the heat that was transferred from the water to the room. In this manner, the water running through my baseboard heaters is always at a constant temperature, and my rooms heat very evenly and comfortably. This was not something that could be said with the old boiler. In addition, because the house is now zoned on thermostats, I'm able to only heat areas where I'm at, not the entire 2 stories of my house. This again saves me an incredible amount of money. The only downside to the boiler that I discovered well after it was installed was how the condensate from it was removed. Due to it being a high efficiency boiler, there is condensate which is routed to a pump and then to my stationary tub in the basement. I was not aware how corrosive this condensate was. As my house was built in 1949, I still have metal piping in many areas, including the waste pipes under that stationary tub. Several years later, I developed a leak in one of the pipes, which upon me trying to remove it, was paper thin. I had to install a pH neutralization system (pipe with marble chips) between the boiler and the pump to neutralize the condensate. I do not fault the boiler or the maker for this, but it would have been nice if the installer had made me aware of this potential issue. All in all, I think this is a wonderful boiler. I have never had a problem with it, I would definitely recommend it to a friend or relative, and given the weather in Buffalo, I'm very thankful I know I can count on it to keep me warm through the cold winters we have.