We stayed in Carlo's apartment for 1 week in Aug '15. First impressions were exactly as it looked in the photos even with mints on the bed!! The interior was very nice and clean and clearly benefits from Carlo's Italian eye for style and decor!
Carlo was a very helpful and friendly host. He even had the ac on for us Irish guests to feel a bit cooler.
The apt is in a great neighbourhood with a supermarket down the street and the tram to the beach stopping almost outside the door. I wouldn't hesitate to return and would recommend Carlo's place as a great base to tour Valencia.