I downloaded lessons 1 through 5 (via Itunes) and while I wish it were more reasonably priced, I'm extremely satisfied with my purchase.
My motivation for learning this language is so that I can communicate with the Korean side of my family (People are always surprised when they learn that I can't already, since I am first generation Korean.) So far, I am convinced that this audio is helping me reach my goal.
The directions state that you should continue with the same lesson until you feel comfortable with about 80% of the course content. I reached an 80% comfort level after having participated in Lesson 1 about eight+ times over the course of several days. I know that sounds like a lot, but it really did not feel that way. I practiced while driving to and from the office, while doing light house work, and once while watching my step-sons soccer practice. I'm certain that if I were to dedicate time to focus on a lesson without distractions, it would not take me nearly as long.
One problem that I have is that I can't fast forward through a lesson plan on my Ipod (you can only fast forward or rewind back to the very beginning of available lessons). There were a few instances where I was unable to complete the full lesson and later had to go through it all over again, just to reach the end. Sure.. it was great 'additional' reinforcement - but a little frustrating at times.
Overall, my experience with this language tool has been a positive one. So much so that I went out and purchased my father his own Ipod so he too could learn Korean with this program (I just surprised him with it last night, so I'm anxiously awaiting his opinion of it.) My mother is very impressed with my pronunciation of the words and phrases I've learned, which I think is a very good sign indeed! As soon as I complete all 5 lessons, I will purchase more lessons for use. I would highly recommend this to anyone who is looking for an easy introduction to the Korean language.