The appartment is easy-to-reach with the metro (5 minute walk). It is a little outside of the histroic city of Valencia, with the metro it takes 10 minutes. On the other hand, the appartment is in the near of harbour and beach, you will walk there just in 20 minutes.
The appartment and the room were absolutely clean. The room has an acceptable size. There is enough space to stay there. But I recommend staying outside, because Valencia is such a beautiful city :-)
Federico is a good host. To my suprise, I could talk with him in German. The welcome was pleasant and Federico give me important informations about the city (sightseeing, metro/bus, supermarket, restaurants). During my stay, he was a good conversational partner. We talked about everything, private stuff or politics.
So, if you are searching an accomodation in Valencia, I can advise you to stay at Federico's appartment.