The apartment was very well equipped with everything you could possibly need. It was warm and comfortable and we felt completely at home from the start. It is situated in a quiet road with very little traffic, but only a short walk away from Welbee's supermarket, buses to all parts of Malta, and many bars and restaurants around Spinola Bay.
Sliema can be got to by either bus or a 30 minute walk. From Sliema you can get to Valleta by ferry (50c for the over 60s).
The are many boat trips that can be taken from Sliema, from a harbour tour to visits to Camino and Gozo.
You can either buy a travel pass for the buses or pay €2 for any distance. The ticket is valid for 2 hours, including any bus changes. A taxi from the airport costs €20.
The only negative point we found was that the lift was out of action, so we had to haul our heavy cases up three floors, with Michael's kind help (the guy who has the keys).
But overall, a very enjoyable experience staying at Cristian's place.