We stayed at Antonio's place for 6 days with our kids (age 4 and 6). The flat was great - bright and spacious, and very well equipped with everything you could need. The location - on a pedestrianised street in Ruzafa is perfect for access to several restaurants/cafes/bars and super close to Ruzafa market. Easy access to Valencia old town, and only 10 minutes walk to Xativa metro station for onward access to beach etc.
Would definitely recommend!