We (2 friends) had a fantastic time in this apartment!
It's all that is says it is in the description, and the location is fantastic: other than being close to so many sights, our personal favourite was the Ballaro market within less than 5 walking minutes; we just loved walking through and get our fresh fruits, juices, vegetables, and more on a daily basis.
I had read in another review that somebody said it was loud: yes, on our Saturday night it in fact was louder than on the other nights, also because the bedrooms go out to the tiny street. However, the apartment itself oozes calm and quiet, especially in the morning and during the day, and the other side (with another balcony) faces a super quiet neighbourhood. The rest we just attribute to the liveliness and hustle and bustle of a big city which is one of the reason we love going to Italy in the first place: it also means we had lovely chats with the neighbours on balconies and in the streets around us.
And check out Palazzo Conte Federico literally just around the corner.
If we go to Palermo again, we will definitely want to stay in this apartment another time!