I had a great stay at Carlos' apartment with 3 friends. 2 of us came to run the marathon so we came to have a calm relaxing stay and we succeeded. The apartment is very nice, has a great location, like 5 minutes walking to Mercat Central and 15 to Xativa/Estacion del Nord. Carlos was helpful and cooperative with some minor issues that presented itself. If you want/need complete silence at night than we do advise you to bring earplugs, since it can get noisy in the street and other apartments.