I had a great stay in this lovely hostel, and totally recommend it! There is a very nice common room with a terrasse, more a great rooftop with a view on the roofs of Sliema, which I really loved.
Moreover, Aaron was a great host, very attentive that its guests have a good stay, and communicative.
Also, I should mention the neighbourhood of the house (Sliema's streets) is incredibly pretty! I even prefer it to Valletta (rather too touristic to my taste); and everything (ferry or bus for instance) is at close walking distance.