Overall: incredible flat, even better than it looks in the pictures. Great host and communication, would highly recommend.
The flat: I can't find a single fault with it. It was clean, extremely well equipped, easily spacious enough for the two of us. Every amenity I wanted was available, and then some. I'm a light sleeper and really value my sleep, and got the best night's sleep I've had on holiday here: the place was quiet, the shutters kept the light out in the morning, and the mattress was so good that I've asked the host to point me to where I can buy one. The flat was very well located - a supermarket just downstairs, bars and restaurants within 5 minutes walk, and an easy 15 mins walk into the very centre.
The host: Michael stayed up very late to let us in after our night flight, which was much appreciated. He was friendly, and is equally good at giving tips on what to see and do or leaving you to your own devices, depending what you prefer. He made himself easily reachable throughout the trip, although there was no reason to do so.