Maria Teresa is a lovely host!
She was very flexible with the check in and answered our questions very quickly! For example: we had problems with the wifi-connection and told her at 12pm, 8am the next day she came by with a new wifi-box. The best service of all the places we visited during our stay in Sicily!
The apartment is really nice and clean (just like the pictures), and even though the electricity is a bit shaky when you use a lot of things at the same time, that was not a big problem. A thing that may be good to know is that there is no elevator. That wasn't a problem for us though because the apt. is on the second floor.
I would with no doubt recommend Maria Teresa as a host :)