This test is a good example what you can achieve after the first 24 lessons:
Improve your Memory, Memory development, Mnemonics, Memorization techniques (I had 2 mistakes) I started in October, lost motivation around Christmas (my gf dumped me ;-) but took it up again some weeks ago and finished the first 50%. I spent around 50 hours for the first half.
As I said before - I think most people (probably 80% but they won't tell you that) quit because it's not the easy secret they expected but a solid method that involves a lot of work. I am working on the next lessons now which involve language learning and the difficulty is pretty tough in my opinion.
I am slowly using more and more of it in real life. It's not just getting familiar with the stuff but actually training and in a way convincing yourself that you can handle more and more data. They do a pretty good job with that in the exercises which give you confidence and increase the amount of data over time.
I plan to get a CFA in the future (Chartered Financial Analyst) and I am sure it will be a lot easier with these techniques than without. By the way I saw your conversation with Ruslan about fake education. He is quite tight on this subject and I tend to agree more with you than with him. You won't get far in life without understanding the things you learn.
By the way I am from Austria and I think you are from Germany. So we can talk about the subject in german if you want. Just PM me and I can answer your questions.
Volkmar