Joe Vitale is a prolific author, speaker, and New Age guru. So, not everything that he churns out is going to be a hit, but he really missed the boat with this one. Sometimes during Instant Manifestation, I feel like he's on the mark with his thoughts, but then, in the next sentence almost, he goes off on a tangent about his car collection or another of his books/audio books/coaching programs, and he completely cancels any momentum that he built up.
Vitale is unapologetic about money, making money, and coming up with new mind games to attract money- so if that is the kind of mind-set that you're looking for, this is a great book for you.
In his book 10% Happier, Dan Harris had a very revealing meeting with Dr. Vitale. If Instant Manifestation left a bad taste in your mouth, I'd suggest reading Dan Harris for a literary shot of listerine and a non-self promotional perspective on self improvement.