I stayed at Tony's place for a few nights because of the Valencia Marathon.
Ideal place, a 10 min walk to Xativa train/metro station/Plaza de Toros, 15 min walk to Placa de l'Ajuntament (heart of the city), a 20 min walk to the Arts & Science Park. The appartment is in the heart of the Russafa area, which has plenty of restaurants and pubs, you have some streetnoise, so bring your earplugs. You can rent a bike (at a fair price) close by to discover the city. Tony is a lovely person, you feel like at home, no stress at all... The room has a single bed (slept very well with the earplugs), small bathroom, and i could use his microwave. You get a key, so you come and go whenever you want. I recommend Tony's place, would go there again for sure.