We were a little late arriving but Nerea was there within a few minutes to let us in and show us the apartment; she was very welcoming and spent some time showing us some local spots on a map before leaving us to our own devices.
The apartment is clean, nicely decorated and has all the amenities you'll need for a stay in the city. It's only around a 10 minute walk to the beach and there's a Mercadona also within walking distance.
We had a really nice time in the city using the flat as a base and would definitely recommend it to other travelers. I would certainly stay again should I return to Valencia.