Charles' place was absolutely fantastic. It's a top floor apartment on the corner of a block, looking out towards Plaça de Tetuan. Everything was as described (or even better)!
We were welcomed by the housekeeper, Conrad, who was very kind and spoke good English. He told us everything we needed to know and then was off.
The area is great, a fairly easy walk to pretty much anything in the city centre. We found a great little cafe a couple of blocks away and spent a couple of hours in there. Would definitely recommend!