This is a review in two parts. The management company went above and beyond to host us. Several issues were addressed quickly; they took delivery of a parcel for me before I arrived and delivered it by hand. I wouldn't hesitate to rent one of their properties again.
The flat in question is a spacious, modern home that is currently for sale. The owner appears to have let it out until then. It had several problems; including dripping rusty water from the roof in one bedroom, one particular A/C dripping clean water onto the sofa, (although overall the AC worked well), no hot water in the kitchen (bathrooms ok), the internet not working when we arrived, and being locked in a room with a broken door handle! Several of these issues were addressed very promptly while we were there, as the management company is excellent, however some also remained outstanding.
The flat had an interesting layout. A large living area is separated from the master bedroom by a long corridor, with two more bedrooms upstairs from that on a separate floor. The space would suit large families with older children. Be aware if you have very young children, you may sleep very far from them, and the courtyard pool isn't fenced. (It's also very deep and cold.)
The location is absolutely wonderful; with an excellent supermarket 2 mins walk away, as well as several bakeries and cafes, the Turia river bed garden park immediately over the road, several playgrounds nearby and an original gate entrance to the medieval city (Torres de Serranos) just across the bridge. As we travelled with a pram, it was great to have direct and level street access. The flat was very quiet as the bedrooms are internal, far away from the road, without anyone else above them. Overall we had an enjoyable stay.