This is an amazing, smartly renovated high-tech apartment. From the keyless entry to the electric blind things outside of the balcony, I was impressed. I live in NYC and have seen super modern office spaces and apartment buildings, the interior of this place kinda feels like a WeWork residence. Shower is amazing, A/C works great, there's a little kitchenette with an electric hot plate, sink, fridge and plates/utencils. Don't be intimidated by the building entry and old elevator.
I dealt with Roberto who was very responsive on WhatsApp. He had a scheduling conflict that was initially inconvenient but we worked it out. I had a few other traveler issues and he resolved well. He even offered to make us a restaurant reservation.
Location is great too, though Palermo is huge.
TIP - take the free walking tour that leaves from a nearby church.