We had a great stay at Sergios appartment. Communication before and upon arrival went smoothly, Sergios son, who speaks English, assisted as well.
The flat is located in a quiet residential area between the city centre and the beach. Bus stop with direct bus to both the centre (about 10 min) and the beach (about 10-15 min) is located just around the corner. There is a large Mercadona (Supermarket) on the ground floor of the buildung. Within walking distance you have restaurants and bars as well.
The flat was clean and the layout very well planned. The aircon works great, only thing to consider in the summer period is that the aircon is placed in the living room and therefore does not reach the bedrooms. However, there are two ventilators in the flat as well.
In all a very nice flat and absolutely value for money. We would happily recommend it for a stay in Valencia :)