Which flaws in particular would you warn inexperienced readers of?
(I ran out and bought the book and just skipped to chapter 19, the one that discusses cryonics and I haven't finished the final one on mind uploading yet; this isn't a comprehensive review but more of a quick first impression.)
The last two chapters bring explicit religious comparisons. The chapter on cryonics starts out comparing Alcor to Pascal's Wager and takes the comparison seriously (and ignores the whole issue of the Pascal's Wager Fallacy Fallacy), and the chapter on mind uploading starts with talking about human's conception of heaven throughout th...
Sebastian Seung's new book Connectome: How the Brain's Wiring Makes Us Who We Are is very well-written, and aimed at a broad audience.
The penultimate chapter explains why cryonics might make sense given our current understanding of the brain.
The final chapter does the same for mind uploading.
Transhumanism continues its march into the mainstream.
Despite its flaws, I recommend the book.