I stayed at Belen's place in Valencia nearly 2 weeks. The apartment is spacious and clean, has everything you need to cook (and do your laundry) and is just a couple of blocks from the beach and a few blocks in the other direction to the train that goes downtown.
In addition, Belen was really communicative on Whatsapp. Belen was very generous with time and speed in responding to questions and in reaching out to confirm when I requested to extend my stay.
Highly recommend staying here!