The apartment itself was very modern and quite stylish, located in a great area of bars and restaurants.
The cleanliness of the apartment at check-in was not acceptable, dishes and pans not clean and some personal items of the previous occupants left in the bedroom. I contacted the agent who did send a cleaner straight over. However, it should not have been required in the first place.
We did have an issue with the heating system. When I queried it I was assured twice that it was fully working. I was told that it was because we hadn't switched the "heat" option on. However, even after that, and with the heating turned all the way up to 30, no heat ever came from the vents, in fact it continued to blow cold air at times. At no point during our 4 night stay did the apartment ever get anywhere near warm. I appreciate it was a cold spell in Valencia at the time, but having to sit and eat breakfast in out jackets due to the cold wasn't fun.
One other point to note for would be that due to a very strange design, there isn't any door on the en-suite bathroom, so you better get on well with your other half, as you will be in full view whilst using the facilities. That's not a complaint as that's a design thing, it's purely an observation.
Would I go back............probably not. Whilst the terrace in the summer would be fantastic, for me the basics of the apartment not being properly cleaned are just not acceptable, especially as all Airbnb rentals insist on the guest paying a cleaning fee. Once you remove the cleaning and heating issues, we did have a good stay, it's just a shame that these detracted from our experience.