Location is perfect and the apartment is great, looks exactly like in the pictures. Just take into consideration that the heating is not included in the price, you should pay additional 10 eur/night for it - I think it isn't clear enough from the listing description. Without the heating it was very cold (we were in December)!
Vincent is a very good host and provides with a lot of good tips about Valencia and places to go. Communication was perfect and Vincent was flexible with arrival/departure times.