On our US roundtrip we stayed for 3 nights in Seattle. From the apartment to seattly city center and the pike place market its only a 10-15 min walk. You can perfectly stay there without a car.
The room and also the bathroom was clean and tidy and we had enough space for all our luggage!
The room is located in an office space, the atmosphore is not like a home, but that was ok, as we knew that in advance. We nearly never met someone there, also no artists or anyone.
The japanise restaurant that Jaq recomments was fabulous! Out of 3 nights we stayed there twice. If you have the chance, go there. We would advice you to make a reservation. But we were lucky ones and got both times a seat without reservation.
All in all i can really recommend the room for a trip to seattle!