Fabulous location right in the heart of the old town but peaceful too. Valencia is a beautiful city and you can walk most of it, anything further is a short metro ride away.
Host was very friendly and helpful with arrival, check in etc. and the apartment was perfect for me two teenage boys and I. We were there mainly for the football (Mestalla is walkable from the apartment) and being in the heart of the city to see all of its sights was brilliant too.
Thoroughly recommend the apartment, city and host