The best!
We stayed a week at Casa Gravina with 5 persons, and absolutely loved it!
The location, the appartment itself and last but not least, the hosts (Giuseppina and Francesco) - helpful and accommodating.
It was the first time for me to use an airbnb, so I was a little apprehensive. But Casa Gravina (and Giuseppina and Francesco) made this a wonderful experience, that I can warmly recommend to everyone. Enjoy Casa Gravina and beautiful Palermo - you will not be disappointed!