Well made, but so what?
It's been done a thousand times before. I'd put it in the top 20%, but there's no hook, there's nothing to really set it apart. I suppose if I were Australian and really wanted to see a by-the-numbers revenge flick with Australian accents, then I'd be attracted to this.
Honestly, though, my first reaction was, "Crap, I could have re-watched Mad Max with that time."