I have spent a month at Greta's place and it was really pleasant experience! The apartment is very nice, clean and comfortable, makes you feel like home =) it is centrally located so you could reach any part of the island in reasonable time, the connection to Valetta is very good and it takes only 1 bus to get to beautiful beaches of Melieha or Golden Sands. Greta is friendly and easy-going person, always very helpful. The only inconvenience I would mention is, that Birkirkara itself is not so interesting place, as there are no promenades or parks where you can walk / run, but on the other side, there is a plenty of shops where you can buy food or clothes for reasonable prices. Anyway, the entertainment is just one bus away ;-)