Place is nice, clean and well equipped, it is a bit far from a beach, but it can be reached easily withing 40 minutes (hint: bus line 806). Also we were able to visit most of the city sightseeings by just walking there, which was really nice. A lot of small and big places around with Sicilian and classic Italian food will be able to satisfy every taste and budget. You should also try bread and croissants with chocolate for a breakfast from Panificio Velardi, which is around the corner.
Sea was warm and beautiful most of the days. Mondello beach is top place for sunbathing. Hint: we left our beach umbrella at Giovanni's place ;) Ask him if it will be hidden.
The only disappointment was Vucciria market, which is in the near of the flat, so if you are looking for some rest, this flat is most probably not the best place to stay. Market workers store their stuff on the first floor of the building (the flat is on the third) and start to rumble very early. Unfortunately their workday is also long, during the week it is until 12-1 am, on Saturday it was until 4 in the morning. Luckily they have day off on Sunday, but we were still able to smell it.