Unbeatable location. Perfect as a place to sleep and shower as you explore the old city. The room was small, but if you are staying in this area you should be out as much as possible.
Just know what to expect: this isn't a big hotel with a staffed front desk. The desk is staffed at limited hours, you have to buzz in at the front door to enter the hotel floor. The staff is extremely friendly and helpful. Just don't expect the traditional full service hotel experience.
Also, if you're traveling with young children, note that the rooms are very small and it will likely be too cramped for a family.
But I will stay here again. If you could choose any location in Barcelona to have a great experience walking around and seeing the city, this is the place.