We had a really nice stay at Carlos flat, beach is very close to reach and good location to discover Valencia.
The flat is well equipped, everything there to cook a meal or to have breakfast.
We did not met Carlos but the contact with him was really nice.
Our tip for lunch/dinner: restaurant Mar d'Amura, 3 minutes walking distance, really nice location to have something to eat in the neighborhood offside the city centre and tourist paths.