We were the for a full 5 weeks, there is probably no better location than this in the whole of Valencia. The apartment is well equipped for a long-term stay and perfectly located for both beach visits (max 5 min to the beach) as well as city wandering (Bus 19 is in the city centre within 25 minutes, 3 min walk to the bus station).
The apartment is very well equipped with everything you need, you will find a lot of stuff for the beach as well.
It is on the 3rd floor so maybe not suitable for people with some disabilities.
We will choose this one again if we come back to Valencia definitely.