I LOVED this place and will stay there again. Room was simple -- no drawers or closet -- but efficiently designed with nice retro elegance. It had everything I needed, including a comfy bed with shelves for end tables and for clothes storage, small desk, chair and stool, even a safe. Communal kitchen was well equipped (no fridge) with lots of seating and there was even coffee, tea, toast and such in the morning. If I hadn't been in a hurry, I would have struck up conversation with the other guests, mostly young people in their 20s from all over.
Location is excellent, with tons of food, coffee, dessert and shopping options. Street musicians in nearby Union Square jazzed up the already energetic SF night scene.
The reception staff were friendly and helpful, as was the breakfast kitchen worker. Only negative was the dingy stairs, probably not actually dirty but dark with worn, stained carpet. At $150 per night, with tax, the price initially seemed high but it had been a while since I stayed in the city, and I came away thinking it was a pretty good value.