Josefa and Carlos's apartment is nearly perfect and provides a wonderful location in which to explore Valencia. It is located near the beautiful Turia Park and practically opposite the very interesting IVAM ( Museum of Contemporary Art) . Its a delightful walk to the tourist center of Valencia, the Cathedral in the Old Town and also the Mercat Central, which is amazing. We rented bikes nearby and used them to see the entire city as well as ride to the beach. Valencia has an excellent system of bike paths (also very good public transportation) and being so near to the Turia Park, which winds through the entire city, provides not only greenery but bike and pedestrian paths throughout.
The apartment is as advertised. It's in a residential building from the 60's or 70's that is set back from the street. We found it to be luminous, bright, spacious, clean, and simply but well furnished. It's also quiet, as there are no cafes on the street. The apartment is very well equipped in terms of the kitchen and, as an extra bonus, there are two bathrooms, both with showers. The air conditioning is efficient and there are fans in the bedroom as well. Out stay coincided with some hot weather in Valencia, but we found that opening the windows at night provided cross breezes to the extent that we didn't use the air conditioning that much.
Carlos (who partners with Josefa) was our host. He greeted us and showed us around the apartment when we arrived and was always available to answer questions before and during our stay. Very good communication.
I highly recommend this lovely apartment.