I don't think anyone can really answer that for you. I have not heard anyone say they were unhappy with their sessions, I know I have learned a lot from mine. But everyone is in a different financial situation, so I can understand the hesitation.
I will say this, I think you can learn a TON from this forum and the book alone. Keep posting, posting, posting. The more you post the more responses you will get. Make sure you are also reading and replying to others. This will give you a ton of information even if you decide the coaching sessions are not for you.
BITS
Happiness is not something ready made. It comes from your own actions.
