Fair warning: I found this book to geared far to much towards psionic characters and very little I would use for my own non-psionic characters. That said I am attempting to review it fairly in spite of my bias.
In terms of value this is a nice sized pdf with a lot to offer a psionic character and still some usage for other characters. It is 62 pages long in landscape, and uses a reasonable font size.
The feats seem reasonable at a glance and range from sacrificing spell slots to gain a bonus in combat, to psionic enhancements and more. There may be a few issues with balance that come up in play, but I would not hesitate to allow a player I'm dming for to pick from this pdf.
The next section is styles. Styles are essentially a free reward for characters that meet the prerequisites. They don't cost anything and are not limited in usage. These become quite powerful including abilities that allow mirror images to make actual attacks (nonlethal damage) and threaten squares, or allow an unarmed strike free ghost touch. However the prerequisites are all steep enough that the benefits will come late enough to potentially be acceptable. Characters that are already underpowered due to multiclassing will benefit from these styles, but ones that are not underpowered may be getting an unfair advantage.
After styles we are presented with prestige classes. As I don't have much experience with Psionics I won't review them, but to put it in perspective there are 7 psionic classes and only 3 wizard classes. Add in that one of the psionic classes is actually a mundane class with psionic focus tacked on as a requirement (Lord General). Two other classes have no actual basis in either mind or magic. (shadow knight, stormrider)
This means that the book touted as for warriors of mind and magic only has 3 classes out of 12 dealing with magic.
The arcane classes aren't particularly well put together in general. The 5 level fortress mage gives up 3 casters levels to get 10 chances to cast shield, mage armour, protection from arrows, and stoneskin without using a spell slot. The character also gains some small DRs and a good fort save. Martial Adept is reasonable. Shadow armourer is a 10 level prestige class with a d4 HD and poor bab. It grants 3 caster levels and good fort and will. For this large sacrifice the character gains armour that is generally inferior to mage armour. The most interesting arcane class is one for monk multiclassers. Transcendent invoker is 5 levels and gives the character monklike abilities relating to spellcasting, such as flurry of spells which allows the character to cast 2 touch attack spells per round. These abilities are balanced by the heavy caster level sacrifice such a character must accept. (5 levels minimum before getting flurry).
The balance swings the opposite direction in the next section with 20 sor/wiz spells, but only 16 powers. The spells are interesting and seem reasonable at a glance. I believe some of them made it to a best of compilation.
The equipment section is hit or miss in its values. I would not allow sale or creation of these items without a price analysis. One the plus side a number of these ideas are not regurgitations of what is already in the SRD.
Appendix one is filled with epic extensions for the content found already in this book. Most of this is straightforward, and is a nice plus for me.
The book finishes with a few pages of pregenerated characters that are a boon to any DM in a time crunch.
It is apparent that to me this book ranks fairly low in utility compared to what I expected. Setting that aside I find that there are some significant mechanics issues but due to the mass of ideas that are still usable this book should be considered middle of the road. I'm giving it 3 stars, assuming that it will be bought for its psionic content primarily.