i don't have the penthouse[it is the outhouse] but i love it! i set it up on a small pipeline last sept. and it is still there.it has a boat seat with a 12"pedestal and a black cat propane heater and is my home away from home.
http://www.hunt101.com/img/059718.JPG
these two were taken from the blind within a few yards of each other.
http://www.hunt101.com/img/096178.jpg