Thermally it has been A1. The flooring in the living area, has heated the whole end of the house to 21 or 22 deg regardless of outside temperature. The heat lingers through the night.

Our dog loves the warm floors!

[The builder] has also remarked on how warm it is indoors at our place. I have saved hundred's of dollars in heating costs. Today I was dressed in shorts and T shirt inside but it was windy and about 17deg outside.