Our stay in Valencia was fantastic, and the location could not have been better. We were in the heart of historic Valencia, right by the beautiful Porte de Serrans city gates. Only a couple minute walk from the Cathedral and the Plaça de la Mare de Déu. The airbnb itself was comfortable, and well-stocked. I would stay here again.
Note that you aren't allowed to drive in the historic quarter, however taxis are very cheap in Spain and easy to find. We had a temporary residential authorization to drive in, but I would advise against it because the GPS will send you in circles driving through the towns as there are some streets that only allow taxis, but the GPS does not know that.