Federica's house is in a great location, super close to the central station has every transportation you need to move to every place you want to visit. You also have a great market to buy all the fresh fruits and vegetables and you have a lot of good places to try typical food with cheap prices. The house is cosy and has everything you need even for a bigger stay. Both Federica and her parents were always thoughtful and nice.
I really recommend her place if you want to have a chilled stay in Palermo :)