Voy a escribir mi comentario en ingles. Asi lo pueden leer mas gente. Salvo's place is really great. 5 minutes from the train station and 40 minutes from the airport. It's really easy to go there.
The place is modern, very clean and confortable. You will feel like at home.
You could visit all Valencia by foot or public transport (Metro, bus). 23 minutes from museum of fallas And The oceanographic. 15 minutes from the historical center of Valencia.
You will also enjoy your stay at night. Ruzafa, where the flat is, are crowded of bars, tabernas(where you can eat tapas)