4* on trust it'll get better.
Because the apartment itself is in a nice location - out of the main touristic routes and close to the Ciutat de les Arts i les Ciències, on the bus line 95 which lead to both the historical centre and the beach. It is spacious and well-furnitured (washing machine, kitchen, wi-fu, Netflix and all the necessary things).
It's still not enough for us to come back: there was mold around the window in a room, mold in the shower, dust - too much of it - on the shelves.
On a personal taste, I didn't like the soft mattresses and pillows - but this is just a personal opinion.
I really hope the owner will fix these shortcomings, and provide a better experience for all future guests.