Castellar 55 is a very narrow street. We arrived by car. No room to park or even unload. Therefore a slight hitch in making contact with Diego the hosts "man" seemed an eternity, when there was no one to meet us at the time arranged. The phone number given was Spanish Speaking! However Diego did arrive and directed us to the lift accessed underground car park, easy for a saloon car but a Land Rover Discovery required removing the spare wheel to fit in.
We did not need the car again as 55 is central to everything you need to see in Seville Centro. 25 minutess walk in any direction covers the area.

The apartment itself was excellently fitted out and decorated. Everything worked. Perhaps the only draw back was having to have the a/c on most of the time as the flat is otherwise airless . That solved we slept well. All very comfortable.