This appartement is very nice and has all the desirable conveniences. It's quite spacious and modern. If you don't know Palermo you might think it's a bit far from the historical center (30 minutes walk) but in reality the Lolli train station is right next to the appartement and can get you to the center very quickly.
Luigi and his wife are very welcoming and very helpful. They will give you tips about what to do in Palermo.
The typical Sicilian pizzeria Sciuscia downstairs is a must, though open only at night.
Overall our stay was great and we strongly recommend this place.