Maria's place is absolutely fantastic, especially the stunning roof terrace with a beautiful rooftop view. The location is perfect, being a few minute's walk from the central station, and close to all the main shops, restaurants & street food market (Vucciria). There is also a Lidl around the corner!!
We visited Mondello beach twice (thoroughly recommended), and that is also very easy to get to by bus, with a bus stop on the main street (via Roma).
Maria is super helpful, giving us a history of the city and lots of tips on the first day. She was always on hand to sort out anything, and really friendly.
We are a family of three, and I would definitely come back here again.