My girlfriend and I arrived in Palermo after a long day of driving through Sicily to be greeted by one of the most welcoming couples we have had the pleasure of meeting. Andrea and Alesia were quick to make us feel at home. They waited for us with some muffins made by Alesia. They were amazing.
Now, for the house: words cannot describe what an experience it is to "live" in such a place. The home is huge, with lots of natural light. The living room is something out of a romantic novel. The bedroom and everything was clean and tidy - to be honest I don't know how they manage with such a big house.
Location wise, I don't think you can find a better spot - everything is within walking distance: restaurants, churches, points of interest etc. Quatrro Canti is 5 min walk, and for see Cappella Palatina you should "prepare" for 15-20 min of walking ;)
All in all, a great experience. Would visit again.