Vanessa's place was lovely, it was everything we needed. We were met by her mother, who also lives in the same building. They were both very kind and helpful, with great communication by whatsapp/airbnb, and the flat was just a 5-minute walk into town, where there were shops and restaurants, and a great view of Etna. The view from the windows in the flat was beautiful too - over the town to the sea. And there was air conditioning in the bedroom and the living room (sofa bed = second bedroom) so we were beautifully comfortable the whole time.
FYI, re access: the flat is at the top of a hill, up a flight of 42 steps, although there is a road at the top of the hill so you can get a bus or a taxi if preferred. Once inside, it's a ground floor flat with no steps, except one up into the bathroom.
To get there, we caught the Interbus outside the train station, which goes to the bus station, at the east of the main street. From there it's an easy route along the main shopping street and then up the hill to the flat. But if you have a lot of luggage I'd recommend getting a taxi when you arrive the first time.