Its basically a con that the teak in Hustle would be proud of... there's nothing, wither, to stop Oxbridge Essays from not bothering to write or send anything, or not care about teh standards of the work- after all, its not as if anyone's likely to complain to their uni or anyone that they were ripped off with a custom essay writing service...
In short, I'm fairly sure that the work they provide isn't of the standard that is advertised...