We had a lovely stay! Location can't be more central (literally 1 min from central market) so you're in walking distance of pretty much everything.
The second best thing bout the apartment is the terrace. It is a great selling point as we spent a lot of time eating/drinking/taking the sun there. Otherwise, the apartment was squeaky clean and full of light. Communication was very easy prior to check-in and the shower is particularly nice!
The only thing I could complain about was the renovation works that took place in the building as they were at time very noisy and did wake us up one morning. Having said that, I'd definitely recommend this apartment and stay there again next time I'm in Valencia.