The most important information is that the room has no window. I was not aware about that as on the picture it looks like it has one. This information should be on the add. Even for one night it was strange to wake up without daylight. It was also stuffy. Bathroom was dirty.
There was loud music all night long coming from a bar nearby or neighbours, I don't know from where, but I had to use earplugs.
There is an African community in the area, bars and groups of people on the street. I don't recommend this location for a girl travelling alone like me.
Apart from that location is good, 15 mins walking to the old town, easy access to the bus station by train or metro.
The host was replying quickly to my messages and was flexible about check in and check out. There were useful leaflets about Bilbao in the room.