Well, where to begin. If you consider all I am extremely pleased with the boiler I have installed in my house. The unit was installed in 1986 by a licensed contractor and was supposedly maintained by the local gas supplier for many years. I have been warned by other contractors that the unit was/is not good. I have done the maintenance on the unit for about 12 years and out of curiosity I got the local gas supplier to come in and do the maintenance one year. The technician that came in was supposedly a boiler man as opposed to a ForcedAirGas tech. He took the unit apart, partially, cleaned it somewhat, said he was done and started to put it back together. I escorted him out of my house. I did a better job the first time I cleaned it. I think the problem we all have is newer products, furnaces, boilers, central air conditioners, refrigerators, washers, dryers etc; are all slapped together with parts made by people that don't know or care where the parts are going. They are then assembled by unqualified/uncaring personnel that know there will be no repercussions if the product doesn't perform or even work at all. They don't care. I was considering an nti boiler as a replacement. It was highly recommended by an HVAC man I met and yet the reviews are not good about that product either. He also mentioned that SlantFin boilers were not made well anymore. That is the other product I was/am considering. From my experience SlantFin boilers have been the best for years with very low frequency of repairs and simple maintenance. As you read through some of the "posted" reviews it's either the customer is happy because he has had no problems or the opposite and there have been nothing but problems, service techs don't know how to repair the units because they've never seen the new configurations, they haven't received training. The warranty packages don't cover the items they should because the manufacturer will not stand behind the product because they didn't make it. So if you buy a new unit you have a 50/50 chance of it being a piece of garbage or lasting longer than 5 years without some kind of major breakdown. Then you have to consider the contractor that's doing the install. The installer can make or break the installation. We have a 55 year old refrigerator at my cottage that we keep for beer, it was used when we got it. Since 1995 I've replaced 2 refrigerators at my mother-in-laws house.