I paid over the odds for the Viper course as Prometheus call it but its just an FPOS-I course. However the course was brilliant and I found that the instructors knowledge and teaching well above average and the course was run really well. You are sent a book prior to attending the course and I found that having prior knowledege from being in the forces helped.
Accomdation and food were excellent as well and I would be happy to return to and do the course again.