Comfortable apartment with a fantastic location. Approx 10-15€ taxi ride from Santa Justa. Easy to grab a cab outside Corte Ingles at the end of your stay. Plenty of wonderful restaurants within a few min walk, with recommendations from the host. Check in was easy and the building was quiet (remarkable, considering the location). Very clean. About 10min walk from the Catedral. Bathroom was nice, couch was comfy. The kitchen met our needs, but we mostly brewed coffee in the moka pot and drank wine. The bed was comfortable (memory foam-type mattress) and the storm shutters kept the room quiet and dark. Central air conditioning was an unexpected plus! Wifi worked fine. We had issues with the washing machine, but there was a laundromat within 2 minutes walk so it wasn't a show stopper.
Incredible location! I highly recommend Diego's apartment.