You should totally stay here.
I needed a place to crash in the U-District while I was taking a professional development course nearby. This was PERFECT: check-in was 100% hassle-free, the place was easy to find and close to everything I was interested in (10 minutes to where the class was, short walk to a friend's place, easy access to the nightlife on 45th to grab a drink with colleagues). The neighborhood is quiet and the bed is pleasantly soft, so you'll have no trouble sleeping. The house is basically a hotel suite -- bed and bathroom and tiny kitchen -- in the cute package of an old bungalow.
So just book it already.