This neighborhood is pretty calm you just walk around even later evening you stop by at the restaurant or pub. Marsascala has a great atmosphere you can just walk to the little supermarkets just a few minutes away from Mario's place. Only one thing to consider is that fact that it is pretty far from "famous" beaches and stuff, but you can always take the bus right across the street of that place which take you anywhere you want though. So, for us this worked very well.
Also like I mentioned, we really appreciated that everything was just like Mario described in his profile so the apartment was very clean and looked new, neighborhood was great to relax, our holiday in Malta was just awesome! Thanks!!