After staying at several Airbnb's and Booking apartments around Sicily. It is safe to say that Alberto's apt was definitely the best.
Apt was clean, we really liked the style of the furniture, the bed was comfortable. Lovely balcony and Alberto was very nice and helpful. At the moment we arrived he immediately started giving tips on what to do in and around Palermo, which was really helpful to us.
The apt costs a little bit more than what we had throughout Sicily, but it's definitely good value. If I get back to Palermo, this will be the apt I'm staying at.