Erika's apartment was fantastic, it is close to several shops, a supermarket and cafe/bars. The Metro station was so convenient for getting to/from the airport and into the city centre. We used the metro most days as it was cheap and it was only around 10 mins to the main stops. The apartment was also only 5 min walk to Valenbisi station where I hired a bike for the week to get around some of the city. Valencia is very cycle-friendly especially Jardines del Turia which can be reached in about 5 mins by bike from the apartment.
The outside space in the apartment was ideal for relaxing and eating meals which we did on a couple of occasions due to the excellent facilities in the kitchen.
When we did go out to eat we often went to restaurants at the marina/beach area which was about a 20 min walk or 5 mins on the number 8 metro. There was also an excellent shopping mall called Aqua about 15/20 min walk south of the apartment on the main road towards Oceanografic. It had several shops and restaurants and a few good bars nearby as well. Our favourite though was La FABrica which is a small restaurant about 5/10 min walk from the apartment.
The communication with Erika was excellent and I would definitely recommend staying here when you visit Valencia.