We stayed four nights here....it's in a pleasant residential area with an excellent choice of restaurants and coffee bars on the doorstep and a supermarket and fruit market one minute away.
The apartment was spotlessly clean and very well equipped ...we really appreciated staying in a typical Spanish style flat rather than a soulless hotel room.
There is a certain amount of noise from the road but this can only be expected when choosing a city location.
The only negative is that it took us at least 25 minutes to walk into the city centre....and we are both quick walkers!but there are several local buses that take you to different parts of the city and the Metro is only five minutes away.
Valencia is a beautiful city and our visit coincided with the lead up to the festival of the Fellas.....a real experience!