We are a family of 4 with 2 children aged 9 and 6. The apartment was everything we hoped for and more- modern but comfortable and equipped with all the amenities you will need for a short city break. We found the location to be good too. We walked everywhere- 15 mins to the port/beach, 20 mins to the Mestalla football stadium, 15 mins to the Turia gardens and a bit further to the central shopping and old town areas. There is a well priced supermarket on the same street and a shop that sells anything you could need next door but one to the main entrance! There are also lots of cafes and restaurants in the vicinity. We enjoyed eating at Little Thai and La Roma in particular. We hired bikes to get around one day and found that the dedicated cycle paths were really useful for the kids. There are also lots of little playgrounds which we stopped at to break up the walking.
Enrique was very helpful and communicated with us regularly to make sure we knew how to get to the apartment from the airport. The airport transfer by Metro was only 8.80 euros for us all and is a 30 min journey.
Highly recommend this apartment and Valencia as a city to visit :-))