Greg's treehouse is a gem. Very clean, and the bed is comfortable. The wood paneling is as pleasing to the eye in person as it is in the photos. I was there for four nights and it never got too hot or too cold; I didn't even need to use the air conditioner. And I saw at most one fly inside, even though I had the shutters open during the day.
There were a bunch of subtle useful things around the house: Plenty of ground coffee and a selection of tea; a decent-sized mirror in the shower room; a nice laundry hamper; tidy cable management for the television; paper towel in the bathroom; plenty of hangers and pegs. The Wifi is good enough to stream videos over, and there's seemingly endless hot water. Greg has put a lot of thought into making the place comfortable.
The house is surrounded on three sides by forest. It's private and peaceful, with the occasional soft sound of rain on the roof, and the soothing sound of frogs at night.