There is lots to like about this place.
The location is fantastic - we found it so easy to explore all of Valletta, or get to Sliema on the ferry, or take a bus to further parts of the island (The bus terminus is a gentle 9/10 minute walk). A pharmacy and a small grocery store are less than a minute up the road, lots of restaurants are just round the corner and a Waitrose influenced food hall lies just beyond the main square, about 5 mins away. Yet Old Mint St itself is quiet and sitting on the roof balcony for 'sundowners' was pretty peaceful - apart from the occasional tunes from party boats on Friday night!
Maria is really good at communications and that was very reassuring. I feel sorry for her that neighbours have been given permission to develop their property and this does impact the apartment. The view of the church is slightly obscured and on two mornings (of the full week we stayed) we were disturbed in the early morning by their work. There are limits over what a host can control and I guess this is the price of staying centrally in a beautiful but fast developing city. Be prepared to look beyond all the builders' detritus in the foreground before you gaze at the sea. From the roof the view is lovely once you've mastered that long focus technique and we felt that space was a big bonus to the apartment, along with the sea view you get when brushing your teeth in the separate loo.
The kitchen utensils are fairly basic and the steps are truly precarious from the lower floor where the bedrooms are to the loo and kitchen, but everything is beautifully clean and the air con works well. It was great to have the lift and Maria allowed us to leave our luggage in a corner of the communal entrance as we had a late flight. The housekeeper was friendly and helpful too. So for all that we had a few minor quibbles it was, overall, a great place to stay.