Very spacious apartment! I had the chance of being their on my own. There's 3 bedrooms: 2 bedrooms with a king size bed each and 1 bedroom with a king size bed and another single bed. The latter is separated from the living and dining room by a foldable wooden and glass door and a curtain, all of which can be opened to create one massive space. There's windows in each of these rooms giving view on the streets below. Two of these windows give way to small balconies. The ceilings are high too, so all of this helps create space, airflow and the great feeling of being unconstrained.
Kitchen and bathroom (only one bathroom as far as I can tell) leave nothing to be desired, except if you're co-living there with 6 other people, things might get a bit complicated at times. But I can only imagine, since I lived there all on my own. Each one of these rooms is connected to a nice entrance hall. There's a storage room connected to the kitchen with a sliding window, which can be opened too. Kitchen has most necessities (utensils, salt, sugar, water and a local beer :). And all rooms have plenty of drawers to store all your stuff. There's a modern big screen TV (unlike the old one you see on the picture), air-conditioning, a stereo system and a library with some interesting Italian lecture.
Flavio is a super nice and friendly host, very joinable, helpful and respectful. Like he says, you will be living in a nice center area of Palermo that is closely connected to everything.
My stay was very enjoyable and I felt like I had my money's worth. Really, if anything, the apartment pictures, at the date of posting this, are doing it a disservice. My first impression when arriving inside the apartment was that it was a lot better than how the pictures represent it to be. So, note to Flavio: the apartment deserves better pictures!