We (two adults one child) stayed in Peres flat for 4 days and highly recommend this flat.
Firstly because of Pere, who very sympathetically gave us a comprehensive introduction and worthful tips about Valencia and flat surroundings.
Secondly because of the clean and spotless flat itself. Nothing was missing. The flat is very close to the old city (about 5 mins of walk), but very calm: No noise during nightly hours. Near by one will find supermarket, nice places for breakfast and so on and so forth.
One small item to know: The flat is in the 4th floor. We were too fast, otherwise Pere would have helped us with carrying the luggage upstairs. We took it in a sportive manner:-) Anyhow, this wouldn't hinder us to rent tis appartment once again, because it was worthy to climb the 4th floors.
Bascially , for all who are looking for a flat in Valencia, can stop searching.