We stayed in Oliviers appartment for 2 weeks and enjoyed it thoroughly. Everything what the description says can be found in the appartment and the location is superb. You can easily reach the historic district or the park per foot or rent a "Valenbisi" bicycle. Although we dont recommend to do so during august, for it gets to hot during daytime. Alternatively it is a short walk to the next busstations from which you can reach the beach. It is also very cheap.
All in all we can only recommend you to stay at Olivier´s and have a good time in Valencia