Everything was perfect: very nice apartment, very nice and trendy decoration. Everything seemed to be brand new and therefore the apartment was very clean. The communication with Jessica and Kasia (a friend who introduced us) was perfect: very quick answers, good tips in the neighbourhood, and Jessica reacted very quickly when some blankets were missing on a fresh night. For us the apartment was great even for 8 people as the sofa is very comfortable. But you should know that the street is quite small and noisy (cars and people coming from bars) as you are in the middle of the old town of Valencia, especially as all the rooms are facing out to the street side.
But all in all it was a phantastic stay at Jessica's house.