We really enjoyed our time in Cristina's place. I stayed there for 2 weeks with my mother and 4 years old son. We felt like at home. There is everything what you need to feel comfortable. AC in each room, beautiful terrace, TV, washing machine, dishwasher, toaster, kettle and so on. The apartment is very clean and contact Cristina is very easy, she is always there to help.
The neighborhood is very calm and safe and the location is just perfect! 7 min walk to Maritim Serrerria metro station which you can use to go to the city center (5 and 7) and to the beach (6 and 8). There are also bus stations close to and you can take nr. 32 to go to the city center, beach and Blasco Ibanez. From the apartment you can walk to the Ciudad de las Artes y las Ciencias (around 20min).
Around the apartment you have few restaurants and bars and places where you can buy ,,comida para llevar''. There is also Mercadona (2min walk) and Lidl (3min walk), few ,,fruterias'' and pharmacies. It is so easy to get there from the airport, you can just take metro.
The only minus for me was the lack of elevator when I had to get 20kg luggage to the apartment but Cristina informed me about it before and it is also in the description so I can't blame anybody.
Summarizing, I strongly recommend to stay in this apartment:) Thank you Cristina!