Yeah you pay before you see the girls and if you go during a busy period they also have duds. I once went and paid 350, didn't like what was on offer and was only offered half my money back in the form of a "voucher" which was basically an A4 piece of paper with a stamp and nondescript signature on it. Was valid for Liaisons in Edgecliff as well according to the "voucher". Went to Liaisons a few months later (well within the expiry date of the "voucher") and they basically said "we don't know wtf this is". Offered to check if I paid upfront with promise of a refund if it was legit. Lo and behold they maintained they didn't know anything about the voucher, insinuated that I'd faked it and basically left me out of pocket 350.
But I have had some incredible 9's and 10's there without the hassle of a more expensive private incall. Moral of the story - book the girl before visiting, otherwise there's no guarantees. Also know that it's more than likely it will only be CBJ. This has been broken once or twice for me, but that's a complicated story for another day.