We had a wonderful short stay in Silvia's apartment. Silvia was very friendly, managed to let us in in time convenient for us, and gave tips about interesting places in Valencia. The apartment is really very clean and neat. The kitchen has everything you may need. Silvia lend us a warming device, so we were warm.
The only downside I'd mention is the fact that the room's windows are facing a tiny inner "well", where outputs of all the ventilations from kitchens of all other flats are. There were always kitchen odors outside, and we couldn't air the room. Also, there wasn't much light, even during daytime.
The location is perfect, right in the city centre. There are multiple sights around, as well as cafes and supermarkets.