from what i hear the audit company a lot of the mines use aren't worth two.......
Assuming Stick Pusher you are referring to Harts, i would suggest you have not dealt with them directly.
I have been personally ( as the CP/DCP ) audited three times by Harts, these guys are very good at what they do, their audits are exceptionally thorough and pick up on issues i thought would be beyond their abilities for a two or three day audit.
IMHO BHP and the like are spending their money very wisely with Harts as their aviation representatives.