When I first read over The Warrior Adept, I found myself excited by each feature as I read through it. By the end, I was outright giddy. Ron nailed it with this product.
This fits snuggly into any setting that features individuals who can manifest a psychic/magic weapon from sheer will and who can enhance their own abilities with powers. The options for enhancing the Spirit Weapon are flexible, allowing players to customize it to suit their combat styles.
Conveniently, I'm kicking off a new Savage Eberron campaign, and I'm including this as an option for anyone who wants to play a kalashtar psychic warrior/soulknife.