We stayed at Guiseppe's for one night.
The place is well located - just in the center of all the main sightseeing points. The room was large, one small bathroom for 2 rooms.
If you plan on driving, better stay away from the city center - due to the limited traffic zone (found out only thanks to Guiseppe) and due to the traffic itself.
Guiseppe's place is good for a visit in Palermo.