The good news: the apartment is clean, spacious, well-equipped and well-maintained, and has a lot of classic Malta/Valletta character. The location is right in the center of Valletta, and the surrounding walking streets are chock full of cafes, restaurants, and shops, as well as important civic and cultural venues.
The bad news: in the evenings, there is relentless loud noise from the nearby night spots, which made sleeping impossible for my wife and me before midnight. At midnight, you can call the police and ask them to stop the noise and they do. (Instructions provided!) But then, in the mornings there was a lot of noise in the building itself -- noisy neighbors -- and a lot of noise from a construction site a half-block away.
If you want to be in the midst of the action, the nightlife, the music and bright lights, this is a great place for you. But if you are looking for something peaceful and relaxing, keep looking.