We stayed in the top floor apartment on Merchants Street. It is a large and well set out a place with all amenities you would want; all conducive to a very relaxed stay.
The added bonus is access to the roof terrace with amazing views over the city and the harbour, as well as the 3 cities across the harbour; perfect for later afternoon/evening relaxing.
You do have to be prepared to walk up 4 floors to the apartment (there is no lift) but for what you get this is well worth doing.
Bottled drinking water is provided, which is a nice extra. The tap water is drinkable, but has a slightly strange taste and tea in particular can taste odd.
Leonard was very helpful, there when we arrived, arranged taxis for us to/from the airport (always good to know you are getting someone reliable for this - and they were very prompt and friendly). He also gave lots of good advice on where to go and when.
Finally the location of the apartment is absolutely ideal. Very easy to get to anywhere in Valetta, across to 3 cities on the ferry and for the bus station to go further afield.
All in all a great holiday - thank you Leonard.