We stayed in the apartment for 6 days and we enjoyed it a lot.
From there we could get to Valetta and everywhere else very easily as there is a bus stop and the ferry in Sliema nearby. In the area around the flat there were a lot of different restaurants and cafés, so there was no problem to find something to eat or to buy groceries.
The flat was clean and it had all the basics we needed. The communication with Irina & Blago was very good and friendly and they even helped us organize the transfer to the airport.
All in all I can absolutely recommend staying in Irinas & Blagos flat! :)