Overall experience was pretty good. Ivano was in Naples (we were there during off season) so his neighbor greeted us and have us the keys. She speaks almost no English so unfortunately she couldn't give us any tips on restaurants and such, but we made do. Plus Ivano called the second day to make sure everything was OK and to give us a heads up about outgoing fairy schedules the next day, so that was cool.
The location is pretty good. Stromboli's not very big, but this place is right off the main street and not far at all from the dock. The hike to the 400m lookout point on the volcano took roughly 2 hours from the front door. Also the view from the balcony is great.
Only minor complaint is that the toilet flushes really loudly and for a very long time. If you get up to pee in the middle of the night it's probably best to not flush until morning.
Anyway in the unlikely event I ever return to Stromboli I would risky stay here again.