I have the strong suspicion that everyone here who gave this movie a positive review is in some way or the other affiliated with the producers, actors or has a share in the profits.
And furthermore, although I am unable to provide evidence of this either, I have the strong suspicion all of the cast and crew were in it just because they wanted to spend time on Malta while getting paid for it.
I don't want to waste much time or many words on this one, but I want to call your attention to the review by @Melius. Although a one star rating seems a little harsh (I am saving the one star rating for movies supporting seal hunting or puppy torture) he has it absolutely right. I have no explanation for the dominance of positive reviews and the only reason I am writing about this epic fail of a movie is to contribute to a certain balance in user reviews.
This movie should be shown in film classes to demonstrate how to ruin a good idea by
a) terrible directing
b) over the top acting (what is wrong with those people praising the performances???)
and c) a terrible, terrible, terrible script.
The people in it don't behave like real people. It's the first time I was so aggressive watching a movie I wanted to punch the characters in the face. And I have seen Transformers 3. It doesn't feel like a movie after all, but... I don't know. I don't know, because the vast stupidity of "A Previous Engagement" sucked my brains out.