I have done this trip twice - last time was a couple of years ago. And Leclused summary is fairly correct.
It is a nice trip with some muddy bits - the exit is very scenic looking across the valley - you land on a ledge half way up a cliff.
There was a traverse line - but the line is there to calm nerves as the rock is loose and flaky - evidenced by one bit of the traverse having come away from the wall (this may have been removed/replaced by now?) - clip in but do not weight it unless you fall off - then hope some of the anchors stay in place!!!
The grassy slope is steep and you need to alternatively traverse/climb it until you reach the footpath - easiest is to return to the top back to where you parked your cars. - I would not be happy on the grassy slopes if it was very wet!!
I do not recommend attempting to walk downhill to the valley - we tried this the first time traversing down towards the footpath aiming to join it lower and got suckered into several deep gulley's that eventually forced us into the main streambed - this was like caving in daylight with large boulders and drops etc. - luckily we did not have to rig any drops and eventually found some paths that took us to the valley floor, took longer than the trip through the cave!!
