If you visited Malta more than 3 years ago, chances are you took one of those old rattling yellow buses which are still memorialized in the form of plaster souvenirs all over the island. You may have enjoyed the novelty, but would not have relished relying on those aging, stiflingly heated hunks of metal to meet your daily commuting needs.
Arriva took over in the middle of summer 2011 with bright and shiny buses imported from Sweden and London. The bright and shiny buses proceeded to burst into flames just about as soon as they were introduced to the unforgiving Maltese weather. That's if they turned up at the right time, or at all. Safe to say that Arriva did not always live up to it's name.
All this is a rather lengthy way of saying that people don't much like taking buses in this country. Particularly the Maltese people - tourists often don't have much of a choice.