8 out of ten equals 80% in one year : a bl**dy good success rate IMHO
Well as a comparison - I bought the Jeppesen Instrument Commercial manual and read a chapter per night in my own time. Then when I turned up to the USA I went to the testing centre, paid my $90 and sat the test - which came back as an instant pass at about 90something%. When I did the flight test, along with my licence, logbook and paperwork, this was given to the examiner to examine.
Why is a £1000 "exam" course even needed?