We have stayed in many air BnB's across the world, 12 countries and 3 continents. Not sure if this was the best but if it wasn't it was pretty darn close. The apt was spotless clean modern stylish and cozy all at the same time. It was totally equipped with quality, sheets towels dishes etc. etc. Not the mis matched hand me downs that you sometimes find in less well managed places. So 10 out of 10 for the actual apt.
Christina handled our booking and was a complete pro, good and prompt communication.
We arrived at Catania airport at 5:30 in the morning. Check in was not until 3:00pm. I asked more in hope than anything if we could get in a little early or at least drop off our bags. The response was above and beyond. Lorenzo met us at the apt just after 7:30am we were so happy and so very grateful. Lorenzo was a source of information and managed to hook us up with and Etna tour which was incredible. We didn't get to the summit so there is a reason to return in the summer and when we do we will schedule our plans around the availability of this apt!