We (me, my wife, and two good friends) loved our time at this funky, charmingly decorated underground lair. There are a million cool little touches, like puzzles, games (3D Connect Four), and cheeky artwork. The beds are comfortable, the kitchen is well-appointed, and the main bathroom is large and quite nice. The second bathroom is a convenient bonus, as is on-site laundry. The property managers left out a lot of towels for us, were easy to communicate with, and even let me stay a bit longer on check-out day when it was freakishly hot in Portland.
It's easy to forget you are in a basement; natural light does come in through a few high-on-the-wall windows. I would only caution you against staying here if you are: (a) VERY tall, like NBA height; or (b) very sensitive to occasional footstep noise above your heads. We didn't have any problems whatsoever, though, and would gladly stay here again.