For the period covered, the 15th century, it is the most thorough book I know. It compares to Noel Fallows' equally thorough book on Iberian jousting -- though the books are quite different, since they rely on different sources. Likewise it is quite a bit fuller than my Jousts and Tournaments, though again availability of the sources accounts for much of that.
What I like about Nadot's treatment is that he is interested in all aspects of the phenomenon: the fighting, the riding, the symbolism, the facilities built, the role of judges and heralds, the role of politics, everything.
Recommended for serious students of formal deeds of arms. And it doesn't cost the earth.
Further update: Nadot has another book from 2010, available at Amazon Canada. All I know is the title, "Break the Lances:"