I had a wonderful time at Marcello's flat. It's located in a very central position, a few minutes away (walking distance) from the major touristic attractions and lively areas of Palermo (Teatro Massimo, Teatro Politeama, Palermo Cathedral, Corso Vittorio Emanuele, etc...)
The flat is brand new and and has exceeded my expectations since it's bigger than expected. The combination between a modern design and retro pieces of furniture makes it very cosy place for your holidays. The apartment was very clean and I found all the facilities I needed in the kitchen and the bathroom.
Marcello was always ready to help me and answer my questions when I needed him, but my permanence in his flat was smooth and easy so I rarely needed his assistance.
As a Sicilian person who knows Palermo very well, I can highly recommend his flat.