Gross. As I said before, my first introduction to the idea of learning faster and improving my mind was Superlearning--well, not first, meditation came way before and is still most fruitful in my opinion--I remember that at the time I too had my doubts. I, therefore, decided not to buy any of their products. Their academic credentials are crap, I agree with you, and their method of writing and ideas also contain a lot of poorly-thought-out BS...same goes for Mike Hutchinson's "Megabrain".
However, the core techniques: using mnemonics and a relaxed, "alpha" state of mind are effective learning aids. mnemonics, if you can structure the information in such a concrete manner, are almost miraculous in terms of memory. I have personal experience with that-- after a few days of practice I could memorize a list of fifty non-sense words in a few minutes...and I would remember it indefinitely until I used the hooks for something else. One list I recalled flawlessly a month later with no intervening review. As I said, the problem lies in structuring the information in such "visualization-freindly" manners. I still am poor at that, so I just use mnemonics- in the strict sense of the word- for lists, and instructions, etc. For more abstract things I at least make an attempt to visualize them, this makes them much more memorable in and of itself.
In terms of superlearning itself, I have not tried it. It seems like a pain-in-the-ass to record all the information and then play it back with music and all. Next time I take a language course, which should be soon, I plan on giving it a shot for my vocabulary. Also check out
www.mindtools.com for an interesting mnemonic related to learning languages.
Let me know what success you have.
Good luck,
Kristoff "Faustus" Olafsson