Wake up and smell the roses ppl. :
Using WFP aint rocket science at all. Scrub.. rinse..scrub..rinse and make sure the frames are waterproof. The course is probably the best sales tool Ionic's use. I should know. I went on one and ended up buying an Ionics system. 
As far as the practical side of the actual cleaning goes, everything I learnt at BWCA I learnt here and by going out with window cleaners for a day. In fact, I learnt more by going out there than from the course. One glaring omission from the course was how to deal with vents just above the frames. However, as I said before, it needs to be borne in mind that this is only a one day course.
Also, the course fee is a tax deductible item so won't cost you the full amount in the longer term.
I had already bought a system elsewhere and started using it a few weeks beforehand. I wasn't aware of any link between Ionics and BWCA at the time of booking the course.