A mirror in the room would be great (but as I said, there is a bathroom just across the hall). Please be aware that staying in the city center may be noisy - I didn't mind, but I know some people may. During my stay I haven't met anyone from the staff who speaks English, but they were still eager to communicate and help. I found it easier to ask about Bilbao at Tourist Info (near railway station).
I was in a double room without bathroom, but two bathrooms were just across the hall. It was comfortable enough for such good price. Great wifi, great location for people who love city life - close to railway station(s), many restaurants, shops and cafes. Small balcony was nice. Staff is eager to help.