These courses are not cheap, so you really need to be sure that you're choosing one where you will get real value for money: where you will be learning from those with tried and tested PRACTICAL Permaculture experience.
If you attend a Milkwood course, then you can be guaranteed that you are learning from some of the best.
Nick Ritar in particular actually has a background in systems architecture, which enables him to translate the more difficult to understand elements of Permaculture design into a language that the layman can understand.
Here is Nick at the TEDx Event in Canberra last year:
Oh, and here's a great video from Milkwood that shows you what can be expected on the course! :)