I've had a Solo 110 for a year now, but have been servicing them for over 7 years as a Technician. The reason I chose this brand was because of its reliability in the field. I was kind of disappointed with the low rating on this site, but then I started reading the reviews. It seems to be very clear that these are all written by homeowners that really don't understand heating systems. I think it's funny that customers are trying to troubleshoot these things themselves. The best thing about Triangle Tube is that, they lock the homeowner out. If the guy who installed your Prestige has a clue, ask him the code to get to the tech side of the control. If he looks at you with a blank stare, then you probably hired the wrong guy! One reviewer nailed it on the head by saying that these and any condensing boilers should only be installed or serviced by qualified Mechanics. Most of the complaints I have read sound like user/installer errors. The controls on condensing units have to be set properly. Most important is that the piping system attached to it be correct, or designed to match the boiler. Most plumbers just cut your old boiler out and connect the new high efficiency boiler to what's left. This is where most of your problems will be. If you read a review of the boiler having frequent error codes and they just keep replacing parts, then they should be more upset at the guy who's making the money off those parts! Maybe they should find someone who can find out why the boiler keeps failing instead of just replacing the things that fail. Trust me, in my field 90% of the time it's something less tangible than the boiler making the problems. This is why I chose the Prestige, heat exchanger has low pressure drop which makes system design easier. Self cleaning heat exchanger which means it needs no annual maintenance, open neat interior for easy access to components, and most of all… Two sided control board, one for easy set up and a back side where you can fine-tune efficiency. There is only one thing I can tell anyone that's looking to purchase a condensing boiler. If the boiler you bought wasn't installed by someone who actually reads and understands the manual, then you will be one of the many frustrated homeowners writing delusional reviews on this page.