The company claims their clients get twice the normal success rate.
BUT you'll never be able to tell whether 1/2 or more of these successful applicants who'd used their services, would've received an offer by themselves anyway, but just felt a little insecure.
The point is, the comapny stands to make a lot of money out of candidates who are good enough to get a place on their own, but can afford to pay for courses and want to feel they've done absolutely everything they can to maximise their chances of getting in.
I will never know if I'd have gotten an offer on my own, but if everyone at my sch had paid for the day, then said twas really useful and I'd not been there, I'd have been kicking myself.