The location is perfect. It is in the historical center and post of the attraction are in 5 minutes distance or even less. Only the famous City of Arts is a 40 minute walk.
Check in was also super easy and the communication was good.
The only negative point for us is that some areas in the apartment should be cleaned a bit better. For example there was some kind of mildew in the shower and some of the plates were not cleaned as well.
(Maybe we had bad luck and the other times it is cleaner.)
Another thing we wanted to point out, is that the apartment is really small for two people. For a few days it is no problem, but i would not recommend a longer visit if you are travelling in pairs.