First off, the location is great! This is a really nice area of Palermo, with loads of designer shops around, as well as nice bars and restaurants. It's a 6 min walk from Teatro Politeama, where you can get on and off the airport shuttle bus and most day trips start from there too. It's about 20 min walk to the old town centre straight down the main road (Via Libertà). Super easy.
My boyfriend and I stayed for 4 nights in the La Cala room, which is probably the smallest of the 5 or so that they have. The design is great - all new furnishings, lovely tiles in the bathroom, there's a bidet too etc. The room is very small, with only the bed to sit on and not much storage space. As we were out all day long, it was perfect for us, but if you're used to having a wardrobe, chairs, sofa, it might be a good idea to go for one of the larger rooms.
Breakfast was included, with fresh goods from the bakery (incl. cannoli), pistachio cream, jams, cheeses, salamis, yoghurt, muesli, fresh fruit etc. This takes places from 8.30am at a communal table, where, depending on your timing, you might get to sit with the other guests.
Hosts are extremely nice and accommodating - we had to skip breakfast one day as we were leaving early and they prepared some snacks the night before for us to take with the next day.
Highly recommended! I'd definitely come back here next time.