Positive points: very nice ground floor flat in a great location. Pol was very helpful with checking in and he provided useful information about local restaurants and bars.
Negative points: flat is noisy at weekends at night - there is a bar next door, which is open until 2am or so. Kitchen has a limited amount of equipment - fine for making a couple of cups of coffee but not so good for making a meal.
Overall: a great place if you want to get into the spirit of Palermo - shopping, eating out and visiting the bars.