Our master bath suite is 230 square feet and I thought I bought a big enough system for the toilet room, shower area, tub area and the large walk-in closet. Turns out I could not heat the walk-in closet because I should have ordered a larger floor area. The coverage area I thought was not enough.
That being said we absolutely love the system, it was easy to install and my wife loves it. Turns out that she is fine with the walk-in closet not being heated floors. We have a family room that is 300 SF that we are going to put tile in and will be buying the system again for that room. We are very satisfied with the exception of the advertised coverage area. You folks might want to adjust the actual floor area that can be covered.