We had a great stay at Alessandro's place.
It's a great, bright, spacious flat. We absolutely loved the roof terrace, which is perfect for breakfast in the sun, or a pre-dinner drink. It's brilliantly located, with the Central Market just around the corner, and all of the major sights within easy walking distance.
Alessandro was a joy to communicate with, and went above and beyond to arrange a taxi for us from the airport, and arranged for a minor problem (which was entirely of our own creation) to be fixed straight away, despite it being a Sunday. He's also spent a lot of time creating the most extensive and thoughtful guide to the city that I've ever seen from an Airbnb host. It has everything you'll need, including brilliant restaurant suggestions.
I'd gladly stay here again when I'm next in Valencia.
Iain