G'day WBC,
I did Rob's course in 1999. I guess it's a little outdated and he didn't offer the couse through the internet then. I found his couse quite good. The texts he produced for Nav & AGK where quite straight forward and he does use a lot of words in his note so you wade through a lot of pages to get to the point like TT books. Flight planning is what most people will agree as being the hardest - Rob does this in a graphical way which I found worked for me. I've got a mate who has just done it via the net and I haven't heard any complaints from him but I'll ask. You may want to think about the benifits of having a hard copy of the info(is this provided over the net?) just for the future interviews etc.
Generally I would say that as far as Perth goes he is the one to go for but if you are going to do the course at home why not have a look over east as well.
Cheers
Lethal