Obviously a storyteller tool only. Handy, tough, cool, and it has a map on it. It contains useful and essential rules for combat and can save time spent paging through the core rulebook.
It has the following tables:
Attack Options Summary
Order of Attack Events (or How to Fight)
Order of Modifiers (handy)
Anima Display
Object Strength (VERY handy)
Weapons Charts (Mundane Hand-to-Hand, Throwing and Archery Weapons including a Tag Key)
Shields and Cover DV Bonuses
Healing Rates
Environmental Effects
Feats of Strength
Poisons
Visibility Conditions (nice to have)
Mount Control Rating
Morale
Difficulty Rating
Success Rating
The weapon charts are especially handy for impromptu situations and while it is expensive, I think it's worth the price.
I know the list above looks sizeable, but upon looking at the screen I think they could have fit a bit more...