I was Adam's first renter at Quitman. I really enjoyed my near 6 week stay. The place was exactly as advertised, super clean, furnished really well (including Adam's home roasted coffee and grinder - seriously good!), and is in an ideal area of Denver as a quiet base camp for exploration or work. Comfortable bed, great shower, full kitchen. All perfect. Adam was great as a host, too.
My only warning of any kind? It is an older place, and the walls are definitely thin, so you will hear the neighbors and they will hear you. Only those sensitive to this or "loud couples" need worry. I had zero issue with it. Nothing above or below.
I highly recommend Adam's place for an extended stay, and would happily do so again.