We have been there as 3 adults and 2 children (3 and 5 years old). Stayed 12-29 August.
Fernando is a great host, he helped us a lot with a little orientation coure and did not mind us bothering him with getting us more equipment for the kitchen because we were a big company with kids. He regulary checked whether we are OK with everything and helped us a lot by ordering for us taxis to get back to the airport on the day of our departure.
The apratment corresponds fully the photographs. It is clean, big and well equipped even for 5 persons.
The location is strategically great. Big gocery stores (Mercadona, Lidl) are 400m-600 m away, smaller locall supermarkets and groceries are just accross the street or around the corner.
Many restaurants and cafes are around. The exceptionally great palce Casa Montana is 100 m away (it is worth coming to Valencia only because of it). Another one La Otra Parte is in 500 m distance.
The connection to the city is there by tram (Line 4 and 6) and bus (Line 19, 95, 2). Better take bus, they have shorter intervals of departure. It is very easy to get to the historical centre and get back within 30 minutes door to door.
The distance to the beach is rather more than 300 m, maybe 650 mm but we did not mind. The walking distance with kids is around 12 minutes which is not a bother.
We enjoyed our stay in Valencia. The apartment was good, the beach was amazing, the sea was warm and calm all the time, the City of Valencia is just the embodiment of the word "beauty".
It was a great vacation for us with nothing to complain about. We will surely come back again.