Luisa's place in the Barrio - the old part of the city (1200?), and is very nice. The building is very old and beautifully maintained and the apartment looks to have been nicely renovated. recently. Recycle bins are nearby - no reason to not use them. And the woman upstairs has a beautiful yellow lab.
The apartment is large and very comfortable, the bed excellent and shower hot. The kitchen is well-equipped and everything works (no dishwasher - not a big deal).
Lots of good restaurants and pubs are very close, bus stops are just down the street and a pretty-good 'express' grocery store is around the corner; the Central Mercado is about 10 minutes up the street for serious grocery shopping - be there before noon and not on Sunday. Google Maps (you know who will probably cross that out) works well -
It's only about a 15-minute walk from the Nord train station but you might want to take a taxi the first time as the streets are a little confusing, especially at night - was about €6 and the driver I had didn't take plastic.
Valencia is fun - and this apartment is very good. Don't miss the zoo, the City of Art and Science (and Oceanographic), Turia Park (almost across the street) and the beach.