Davide's place is a good location for sightseeing. It's within a 15 minute walk of most of the major attractions in the center of the city, and also very close to lots of bars, restaurants, and interesting shopping. The apartment itself is a little spartan - there are some very basic cooking pots and utensils (although there is a full-sized fridge, which is great) and the space is not particularly lovely. But it definitely has everything you need, including a washing machine. The area immediately around the apartment is fairly noisy because of the bars around the corner, especially between 10pm and 1am, and during the day there is a lot of traffic and business on the street, so don't think of this as a "retreat". This is a great place to stay if you're looking to explore Palermo and you want some homey amenities, but don't expect a lot of frills.