Miss B I worked for a airline training company quite a number of years ago (around 10 I think) and I can honestly say that I think the course is only beneficial if you don't know anyone that works in aviation that can give you a insight into the job and lifestyle.
Otherwise I really do think that it is a waste of money doing the course. The type of stuff we were teaching people included 3 letter codes, the 24 hour clock etc etc And this is all stuff that will be covered on the inital training course anyway!!