I was thinking about doing the American flyers CFI-A and II but thought long and hard about it and decided it just wasn't for me. I did a 2 week commercial and that was hard enough trying to get all the info in my head that fast. I passed but like you said didn't feel as good about the material as I could have.
Now Im doing it at my local FBO taking my time and flying when I feel its needed and not when Im told to. I'm also saving a ton of cash this way too!