HKguy, I am sure some people will vouch for these types of course, but In my opinion it is a complete waste of your time and money. The team that interview you want to talk to YOU, not to someone that has been molded into the "perfect" applicant, and they will know instantly whether or not you have been on a course. The information required to go in to the interviews and perform excellently is around, just spend some time reading through the topics on here for a start, and then utilise the internet, EVERYTHING is available with a bit of searching, if you work as hard researching and studying for the interview as you would raising the funds for this then you will be absolutely fine.
Tupps