I have to give my opinion on radiant floors after having them myself for over a year now.
I seriously think that radiant floors are the future of whole home heating! Right now the price of radiant floors are expensive and not everyone can afford them.
But I think that in time, radiant floors are going to go the same way that central HVAC did about 25 years ago, which is that the prices will come down to where the average working class person can afford to get radiant floors for their home. It will be the way that everyone heats their homes in the future I think! Central air conditioning will still exist for cooling until someone comes up with another more energy efficient concept, but the central heating and A/Cs will no longer be that, then they will be just rest alone central air conditioning units. Your heating will be taken care of from radiant floors throughout the home, and ever since I have had radiant floors not only has our weekly bills been super low in the chilly winter time weeks of the year, but also the way the radiant floors heat our home is like no other form of heating I have ever experienced. Everything is so nice and hot with no chilly spots in the home whatsoever. Also I have to say that the radiant floors give off a better form of heating than central heating and A/C’s gas furnaces do.