The Treehouse is a great, bright, clean, well-appointed, and cozy place to stay. I was traveling solo and was very comfortable there.
It's on top of Jay's home, and with its separate staircase entrance it feels very private. Jay was clear with communication; I briefly chatted with him and his family, and they were all very friendly. Parking was easy. The neighborhood of Columbia City (which I hadn't been very familiar with, despite visiting Seattle many times) was fun to explore. I'd be happy to stay here again.