Ester graciously accommodated us on less than 24h notice, and the apartment is great — spacious, and with an amazing terrace (and yes, the view of Etna is as good as in the pictures).
Yet Ester and her mother then took things to the next level with excellent local recommendations, and greeting us with homemade food and drinks (Limoncello made from lemons from their garden, and wine from their own grapes).
That's the kind of personal touches you just don't get with hotels and other commercial types of accommodation (and frankly, with many options on Airbnb nowadays).
Highly recommended!