The apartment in Qawra was perfect. It got all the necessary equipment and was in a very good condition. Even if its hot outside its quite cool inside the flat, because of the windows and balconies, we didn't turn on the A/C at all.
The busstation, with buses to all directions, is just down the road, 5 min walk, very convenient.
Sheila picked us up at the airport and she is a very nice person, told us a lot about the Island, good restaurants and so on.
I would highly recommend the Qawra apartment, and hopefully will have the opportunity to go back again.
One warning, don't go to Blue Lagoon in high season, hell on earth!