My wife and I stayed in Ramon's apartment for three months. It was our fifth trip to Valencia, so we knew what neighborhood we wanted to stay in and it was perfect for us. Easy walk to Cabanyal and the beach, as well as to Turia Park and the Arts & Sciences buildings. Lots of great places to eat around there (and all over the city). Near the Maritim Metro, so anywhere else is easy that way.
The apartment is quiet, spacious, and fully furnished. Good kitchen with everything you need for a long stay. As a nomad, I've stayed in a lot of apartments and this was one of our favorites. I will book it next time we're back in the city. Highly recommend.