Rosario was a incredible host. He is very nice and he gave us a lot of advices about Taormine and how to visit Etna. Concerning the flat, it was large, practical and comfortable. He was just near to the sea (2min by walk), but a little bit far from Taormine if you want to go in the city center by walk (30min).
So, it's the perfect apartment to visit Taormine and Etna if you have a car (it's very easy to park it just in front of the apartment)