We agree with all of the fabulous reviews! Great location, wonderful host, lovely clean apartment with amazing views, in the best part of town, quiet at night. We loved our stay and would gladly return in the future.
The one thing we were a little surprised about is how hot it got in the kitchen in the afternoons, especially with no indoor blinds on the windows. However since we mostly used the kitchen in the mornings and evenings when we were out on the balcony, this was not a big problem for us. (The AC in the rest of the apartment, like many people have mentioned, worked perfectly. There is a unit in the living room and the bedroom, and these rooms were easy to cool down.)
If you are considering this apartment, just book it! This place and the city of Valencia are both wonderful.