Check out my review of the Ultimate RC Course here
I went and bought the RC Powers ultimate RC course yesterday. I bought the master version where you get almost three hours of material and four (4!) of their pdf plans as a bonus. After looking/listening through the first few modules I really see that this is a good thing to buy. Even though I would say that the biggest audience for this course are the RC hobby beginners I would also say that this is a gem for those that has been into the RC hobby for a while. Actually, I really believe that I would have saved a lot of money if I had the opportunity to buy this when I started.
I think I will come back later with a small review of this course when I have listened through all the included material but just because of the good deal together with those bonus pdf plans I would already recommend a purchase.