Excellent position, a short walk from the Central Rail Station, near to everything you'll want to visit by walking/public transport. The breakfast is very abundant. The staff friendly and very helpful. You can find the city map on the reception desk, or ask for one, they'll give it to you for free. Nothing spectacular in terms of decoration, but without any doubt great value for money. Don't expect too much of comfort - the room I had, was big enough, with very small balcony which is certainly useful for guests that like to smoke, but not the room in which I could spend much time. On the other hand, Palermo is such a lovely city that won't let you to stay in the room...
If I ever visit Palermo again, I won't hesitate to book Hotel del Centro.