WHAT YOU SHOULD KNOW: As above, you can get it as a single PDF or part of the Companion Volume 2. The purpose of this Companion is help out a bit with defining a character by making use of different archetypes. About 15 archetypes are provided, with descriptions and advice on combining each archetype with each of the five Roles, as well as a Talent that fits each Archetype. Maybe your Hitter is a Mama Bear (or Papa Wolf), maybe your Hacker is a Romantic, maybe your Thief is an Artist, maybe your Grifter is a Rebel and maybe your Mastermind is an Architect who has built each of their plans off of the backs of their last ones.
WHAT WORKS: A real simple way to get a starting point for your Leverage characters, using common archetypes as the core concept (combined with the Roles, obviously). Some of them are truly inspired, as are their related Talents (like an Architect getting a bigger Asset die when using a Callback, since they are building to these moments).
WHAT DOESN'T WORK: Some of the combinations don't fit so well, and at times the writing seemed to struggle to define the Archetype/Role relationships without repeating the same ground. Several of the pages carry the footers from the Hollywood Hacking Companion, which presumably got brought over in formatting but never changed.
CONCLUSION: A very useful Companion for those struggling with character creation, or for those who are maybe looking for inspiration for a unique spin for their next character. I also appreciate the fact that there's an attempt at backing these decisions up mechanically, with the inclusion of Talents. A good, well written companion piece to the Leverage rulebooks and supplements.