I bought the Awakening Prologue from
Centerpointe and have been keeping a blog on it (in my sig).
In short, so far I like it, and the money I spent doesnt seem like a lot in terms of how much material I have recieved from Centerpointe. I also think spending the money on it will be more of a motivation to use it every day than a single 25 dollar CD. It is also a program, not just a soundtrack.
You could however make your own soundtracks you want, but I like the idea of someone else doing the research for me and me just reaping the benefit.