I think for that price it is worth it. Especially if you are doing 10 return trips a year. I got it before going on a round the world trip with Oneworld when I was 23 and it was of great value for delayed flights and somewhere to escape the madness. Domestic trips were then a bonus. I also could then get to the airport earlier to grab an exit row seat and then had somewhere to hang out comfortably. I have now learnt some tricks to secure exit rows before i get to the airport.
It is great when flying Jetstar as well because you get access to QP if the are open.
Depending on how much you like drink, the QP can be a great place to start for you and a friends on those weekend trips away.