Thanks for inquiring man. It has been holding up VERY well!!! The minimum temp reading in the cooler side of the heat box (by the door) through all these cold nights (last night was 44*) was 69.9*. Keep in mind that temp is the absolute coolest it has reached in there, and that temp only stuck for maybe a couple minutes tops, until the t-stat called for more heat. I just checked the surface temp and its staying pretty consistent at 72* with an ambient of 75. Not too bad considering the dirt outside was 51*!!
The only real concern i have is keeping the humidity up. its friggin bone dry in there man. that hot air just dries out everything, it sucks. Even with the sprinkler idea, it just isnt enough, unless it turns on like every hour, lol.
She has no trouble at all knowing where to go when the temps drop. I have checked her every night so far. She knows right where to be, and when to be there, its truly amazing.