The contact with Kristin was very friendly from the beginning and she answered all our questions very quickly.
Location: The apartment is perfectly located in the amazing neighborhood of Russafa. Nearby there are countless restaurants, bars and stores. Also the metro, the train stations and various bus lines are within walking distance. Also the the old town can be reached after a few minutes walk and the Turia park is maybe 15 minutes away.
Despite its central location, it's quiet, except perhaps on Saturday and Sunday mornings when the drunk party people head home.
The apartment had everything we (two adults and a nine-month-old child) needed. If you plan to cook often yourself, maybe some tools are missing in the (small) kitchen, but for us it was fine.
An absolute plus is of course the large terrace. The only small drawback is that the WiFi does not work there (it is also sometimes a bit unstable in the apartment).
We can definitely recommend the apartment and will be happy to stay there again on our next visit to Valencia.