My parents stayed at Raul's place for a couple of days. They enjoyed their stay, the apartment is centrally located 5-10 minutes from the central market, and 5 minutes from the Botanical Garden and access to the Turia park.
The neighborhood was quiet (might be because we visited just when the tourist season was starting), and felt safe and friendly.
The apartment is true to the photos and was well stocked and clean overall. Very good for a few days stay to explore Valencia.
The only minor thing was that we had to wait 15-20 minutes for the host to arrive although we indicated the hour when we would be there. Besides this, Raul was very friendly and explained any details about the house, and even had a bottle of wine for us.