The padded cell is great. We are 11 days into a trip thru Nevada and Utah, with temperatures down to between 36'F and 50'F (so far). But days have been up to 82'F.
We have the thermo pack installed with the window coverings on the side windows. I previously installed thermo pane in the door and 1/2 foam covering the front window with a removable center section to see out the back while driving.
Also new for this trip are foam kitchen fatigue pads on the floor. Costco had a deal on them. We cut one to fit under the front dinette and one down the center aisle. They add to the 1" insulation that I had previously installed under the floor. They pull out for cleaning, can be hosed off and boy are they soft and warm on bare feet!
We sleep E-W and my wife sleeps in front over the cab (the coldest spot). In 11 days, she has not once said she was even somewhat cold. The nights around 40'F or colder are the best test - even with the same thermostat setting, she was often cold or a bit cold at night with the old thermo pack.
I also feel the heater (propane or a small electric when shore power) cycles for much shorter periods. And the propane appears to be lasting longer. This is all subjective, of course, but I'm monitoring the propane consumption and that should be less subjective.
On days in the low 80'Fs, covering the window in direct sun makes a very noticeable difference,
And yes, our padded cell also has some sound deadening.
