I don't think anyone else can claim to give you as much bang for your buck as Kent David Kelly. I've bought so many of his books and they are always packed on every page with good stuff. Just as a blanket statement - I highly recommend his resources.
Specifically to this product, I'm very glad he chose to feature the knightly classes. I'm very drawn to the knightly classes, but don't always want to play a Paladin. This resource brings back all the great features of the cavalier class and expands on it. I'm a big fan of the Matter of Britan - Arthurian literature. But, even though the paladin class and the Knights of the Round Table tend to be associated in our minds, very few were actually paladins. Only Lancelot and Galahad (and perhaps Arthur in some tellings) demonstrated the class features of the paladin. 98% of the Knights of the Round Table were likely cavaliers as presented in this book.
There are very good sections on the Cavalier's weapons and armor and how this class will both limit those choices and enhance those choices.
Chivalric virtues is a great section and calls to mind the Trait system of the King Arthur Pendragon RPG (Chaosium).
Hierarchy of conflict is a great table for determining who your Cavalier will naturally single out for combat.
I really like the level of detail for the warhorses - knowing more about the breeds & the likelihood of each breed willingly entering combat.
[5 of 5 Stars!]