I spent a wonderful month in Rabat and called this apartment "home" for the duration. The apartment is very spacious and has most of the conveniences and could easily accommodate a family of 4. There is a very functional kitchen where you can cook full meals or light snacks. There are also numerous restaurants/cafes close by for eating out. The apartment is located in the heart of the historical part of Rabat and a very short walk away from the walled city of Mdina. It is also very close to the bus terminal where it is possible to take direct buses to many part of the island (including Valletta and the airport).
I can highly recommend Marco's apartment to singles, couples and families.