I stayed for a week in Mark's flat and could not have been more content. The flat itself is light, spacious and airy with a lovely flow between the rooms and beautiful aesthetic details throughout (floor tiles, original glass doors, an open balcony as well as a traditional enclosed balcony). The flat is situated right in the heart of the Valetta behind the Grandmaster's Palace (the flat actually looks onto the back wall of the Palace and over its roof) with easy access to everything in the city. Valletta itself is very small, but even so the flat is perfectly located at the point where Merchant Street switches from being quite touristy to predominantly residential so it's great for access to restaurants, exploring the quieter residential areas beyond St George's Square or slipping down to the harbour for an evening swim! Mark was also the perfect host - communication was clear, he answered all my questions promptly and I was left with nothing wanting for my stay. I highly recommend it!