This is not a typical tourist development beside the beach, but an unique house overlooking Valetta and the dry docks. Lots to look at as the boats come and go, and be amazed at how a 300m long cruise ship can turnabout in the Grand harbour. Bring some binoculars and check up the ships on a vessel tracking website.
The house spreads over 3 floors plus a sunny flat roof - its an older property but is completely designer-modern inside, with a some quirky features and a full-height atrium. For that reason its fine for (fit) adults but not young children. Its well-equipped although it has no AC. but the atrium keeps the house cool. There is no street noise but you might hear a quiet throbbing if a warship is in dock.
The promontory district of Senglea is a working area, you are at one of the highest points with good views. Waterside restaurants are 5 minutes away on the north side. Valetta is accessed by regular bus routes 1, 2 & 3, but its nicer to use the ferry boat about 15 minutes walk away in the next bay. A weekly season ticket costs just 10-euros and the commute across the harbour makes a great start to your daily adventures (and the ticket includes the lift up to the Saluting Battery).
Note - the "owner fees" quoted on tripadvisor appears to be only an approximate guide, as the actual charges can vary a little bit depending on check-in times.