Hey Chris,
I had a the previous model Packvest by Patagonia.
It was the best pack I have ever had – I had a number of others too, including Airflo, Fishpond and others made locally in RSA.
The new Sweet Pack/vest is on my list to be acquired. Just haven’t been able to find anything that suits my needs quite like the Packvest does.
Let me know how you go in your search – if you decide to get one, maybe we can share the shipping costs, as I’m also in Melbourne.
Cheers,
Daryl