'Great Australian Bushwalk'

Has anyone been involved in the 'Great Australian Bushwalk' in Tasmania (or elsewhwere in Australia)? Either as a guide or a participant?
I've only just heard of it for the first time today, and would be interested to hear any comments on it from participants.
I've only just heard of it for the first time today, and would be interested to hear any comments on it from participants.