My husband and I stayed at Filippo's flat over the Christmas holiday and had a wonderful time. It was the perfect amount of space for us, the wifi worked well, and we really enjoyed the neighborhood. We didn't spend much time on the deck because it was pretty chilly, but I can see it being nice in warmer weather.
There wasn't a ton provided in terms of advance check in or check out instructions, but Filippo was super responsive and friendly whenever we had any questions. The kitchen is adequately stocked for making smaller/simpler meals, which is really all we needed. The bathroom/shower is a little light on amenities that female guests might want (conditioner, bar soap, etc.) but guys probably wouldn't notice a thing.
Overall a very enjoyable stay in a nice, hip neighborhood.