My husband and I stayed in Casitta Sister for 9 nights in Stromboli and it was amazing! We were greeted by the lovely Massimo who gave us the house rules and awesome recommendations.
The home is wonderful and is filled with a rustic charm that is so unique. Please note that each room is separate. Specifically, the bathroom is separate from the bedroom and you do have to walk outside to access it. The kitchen is gorgeous, newly renovated, and overlooks the incredible view of the Stromboli island. It is located about 15 minutes (walking) from the harbor, but please be aware that it is a steady incline, so prepare for your legs to be strengthened by the end of your trip. Once you've arrived, it's well worth the journey due to the surrounding nature and restful silence.
Lastly, the on site manager, Massimo is simply the best! He was so helpful and incredibly punctual. He also does boat tours of Ginostra (the other side of the island) to watch the Stromboli nighttime explosions. Highly HIGHLY recommend taking him up on this service.
Overall this trip was enhanced 100% by choosing to stay at Carlo's Casitta Sister!