We were given clear instructions on getting to the apartment and were able to check in at the agreed time. During our stay we were easily able to contact the host, Lula, if we needed to ask any questions.
The apartment had just been cleaned and was spotlessly clean. Although situated in an old building, the third floor flat itself had been newly renovated and was very comfortable, with all the facilities you'd need for a stay in the city (a/c, cooker, fridge, television etc). We stayed for two weeks and the flat had everything we needed for a pleasant stay. There are bins for recycling just across the road from the building.
The location was ideal for us. It is in the central market are of the city just on the edge of the central El Carme district. The market is a minute away where you can get a whole range of delicious food including really fresh fruit and veg, meat, fish and bread. There are also lots of bakeries and groceries a short distance from the flat and even a 24 hour convenience store nearby. The centre of the city is 5-10 minutes' walk away where there are lots of shops, squares, restaurants, cycle hire and a loads of the interesting historic buildings of Valencia. A bit further across town is the lovely Turia park - still well within walking distance. The main railway station and one of the main Metro stations (Xativa) are about 20 minutes' walk in the other direction - so everything is well within reach.
We found that - although it was central - the flat was not too close to busy restaurants of bars and the traffic was very light, so we weren't disturbed by either.
The flat itself had a lift and stairs from the entrance lobby and had efficient air conditioning, but equally but had lots of windows which both let lots of light in, and allowed good circulation of air when you didn't want to use the air conditioning.
All in all, this apartment was ideal for our stay and we would definitely book it again if we visited the city in the future.