Kenneth & Fiona are great hosts that help you any way you need. The apartment is nice and as described (good air condition in bedroom) with a lovely view of the Harbour.
The location is ideal. The waterfront is filled with quality restaurants and bars with special mention to Birgi cafe, which is straight next door. This is a legit morning cappuccino spot.
The ferry to Valletta is quick and scenic and runs until 00:00.