I was a bit worried location wise as it is not very central but it's actually perfectly located.
You are 10 minutes from the beach which is perfect as you can walk back to the flat and shower.
In about 30 minutes, you can reach the historical city center.
The host's English is pretty good which is very handy if you need anything.
You also have one the best authentic restaurant 4 minutes walking: Cellier l'Aldeana. That restaurant serves you food that will truly make you miss Valencia. I actually wanna come back to Valencia for that restaurant.
In short, great flat with AC and functional kitchen only 10 minutes away from the beach with great restaurants around.