Mario's place was great for several reasons: it included everything that you could need, from towels (beach towels as well) to laundry detergent to everything that's needed in the kitchen. The apartment was in order and fairly clean. The only real flow was the building, really not what you would expect for a vacation place. Luckily the apartment was renovated and tidy.
As for the position, it was very close to the Mellieha sandy beach and to the place where to get on a boat trip to Comino, Gozo and the caves. However, bear in mind that this is not a place to go out at night, you need to move to other places for that. If you're looking for a quiet and relaxing place, this is the right one.