It took me 7 or 8 months to finish listening to this on audible.com. Ultimately, it boils down to this: our brains have far more plasticity than we ever thought, and we can literally change our brain structure by lots and lots of mental rehearsal.
Evolve Your Brain is extremely technical; Dispenza was trained as a chiropractor and later studied all sorts of other scientific disciplines. I was going to say it was extremely scientific, but i'm not sure how legitimate the science is. The chapter headings include "Neurons and the Nervous System: Traveling the Original Information Superhighway," "Neuroplasticity: How Knowledge and Experience Change and Evolve the Brain," and "Taking Control: the Frontal Lobe in Thought and Action."
Most of it was interesting, so I kept on going (which, for me, involved rewinding a lot, since due to the technical nature of 90% of the book my thoughts would often wander). I would undoubtedly have done much better with the written book.
Only one really annoying stylistic habit annoyed me: Dispenza will never use an adjective when he can use four. Really; four seemed to be his favorite number. It's not an unusual writing habit, but it's usually unnecessary.
This was well-narrated; I was quite proud of myself for catching a mispronunciation (he quite clarly said "predeliction" instead of "predilection," making me think I'd gotten it wrong my whole life).
Dispenza has a very optimistic world view; apparently he belongs to a spiritual sect (Ramtha) that is said to channel a 35,000 year-old being, Ramtha the Enlightened One, who teaches that "human beings have the capacity to utilize their inner wisdom, focus their brains, and create their own reality" (that's from Wikipedia).
I am interested in reading another book by Dispenza that I have, but am less and less interested in "personality overhaul" programs as I get older; I always found them intriguing and was certain I'd be able to eliminate any bad habits and become enlightened/organized/psychologically savvy and balanced/more spiritual/etc. if I'd follow the program, but I never did, and ultimately I suspected that nobody ever did 99% of them so it would be hard to prove or disprove their efficacy.
I won't remember much of this book; as I said, it was heavy on the science, and the rest of it was mostly positive stories about people who eliminated terminal cancers and other physical and emotional and mental barriers and became a zillion times better at whatever they set their minds to.