I picked up this copy a while back:
http://amzn.com/0812219090It looks like the one you've selected on Amazon has the original text, which my copy does not. It has only the translation, but it also has Kaeuper's commentary and introduction which is immensely useful in understanding the context in which the book was written.
I think it's a very interesting read overall, and you won't be disappointed. Since it's a book written by a knight, for knights, and is more or less a guidebook on how to be a knight of worth, it makes a good historical study. The downside is that it doesn't necessarily translate well into modern life, since most of the book is devoted to comparisons of levels of worth based on deeds of arms in a variety of contexts. It's still a great book to have, for sure!