The location of the apartment is great to explore Palermo.
Nevertheless we were disappointed, because the description on airbnb does not include the fact, that the bathroom is shared with about 6 other people.
The balcony was not clean, even after the housekeeping passed, there were loads of hairs on the pavement. Also the sofa had strange spots on it.
The size of the room was absolutely ok, but in my opinion far away from being 40 square meters.
So if you are looking for a central and very simple place to stay in Palermo maybe you'll be ok with this, but be prepared that not all the circumstances are described correctly.