The flat was exactly as I expected and as it is represented in the photographs.
There are 3 bedrooms each for two people. Beds are comfy, sheets and pillows are clean.
It has nice, fully equipped kitchen.
There are two toilets available but only one shower which is a bit small and difficult to take shower in it especially if you are tall. There were towels provided for each person.
The flat is in good condition, newly furnished and clean.
Location of the flat is excellent. It takes 10 mins walk to go to the historic center of the city. Also there are local restaurants, markets and pubs around. Airport shuttle bus stops just in front the square near the apartment.
Angelo is very friendly and welcoming. He responded to my messages really quickly and in detail. He welcomed us personally and showed the apartment and explained how to use the equipment. He was kind enough to put tea and coffee for us to use. He provided a map, marked the historic buildings and suggested local restaurants that we may find worthwhile to go and experience.
There is only one downside which is about Palermo, and it is not related with the flat tough. If you are going there by car, be aware of that you may need to pay 1€ for parking to some random people in addition to the parking price. They are all around the city so you may face this issue everytime you park your car to a legal parking spot. These people are not authorised by local government but just random people claiming that they are protecting your car from something bad to happen. Unfortunately they are present around the apartment too. But of course Angelo cannot do anything personally regarding to this problem.
We really enjoyed staying there and I recommend this flat.