re: Anyone here have their entire house spray foamed?

I used spray foam in my walls. Big time energy savings when compared to the other houses in my neighborhood that didn't. I've been happy with it. If I could do it again I'd spray the roof decking as well and insulate the attic space. More energy savings by having your HVAC in a semi conditioned space.

Lots of conflicting opinions by contractors or HVAC folks, mainly by people who are uninformed in my experience. As others mentioned you need to re-size your HVAC and bring in an air exchange but worth it you can find someone who knows what they are doing.