We had a lovely stay at Antonio's apartment. It was exactly as shown in the pictures and the terrace in particular was fantastic and a really great size. Antonio, and the rest of the family, made us feel very welcome and he was very contactable (for restaurant recommendations etc.) throughout our trip.
Valencia's metro system is very straightforward and provides easy access into the historic centre. We did a guided bike tour on one of our first few days which was a great way to see the city/get the insider knowledge on places to go and things to see. There is also a small tourist information centre by the nearby taxi rank (walk out of the apartment and turn left) which was a great help for the transport system.
Night time noise was what you would expect for the apartment's location and the time of year. Although this was sometimes noticeable, it did not keep us awake. Overall we had everything we needed for a great holiday - thanks Antonio!