I used to be of the opinion that it was fairer. I no longer think so. I agree with former PM Paul Keating, who referred to the Senate as "unrepresentative swill"[1]. When I first heard this view, I thought Keating was nuts. What could be better than PR for giving minorities a voice? All you need is portion of votes and you get a seat. Seemed pretty fair to me, and allowed members of minor parties to have a say in the passing of bills into acts.
But that's the problem. Very often a few minor party seats hold the balance of power. The 2 major parties are deadlocked in disagreement over some legislation and whether it becomes law or not falls into the hands of a few senators represented by a minority. So oftentimes the "uprepresentative swill" get to pass law, or not.