This 460 year old book is interesting from a cultural perspective (it also appears to generate interest amongst the Alpha males/females). For me, the book reads as a "how to" strategy for preparing and defeating opponents with the long sword and sword, while maintaining a dispassionate self, centered in the "void." This seeming simple book, is not as it seems and needs to be seen in context and the material merritts additional study (my opinion).
The book seems to be an adequate translation, but I would recommend two others, except I wish to avoid advertizing them (and possible adding my own prejudices). I add this only because in translations there are differences (and more expense) and these can be meaningful. I also recommend the commentaires.
It is not expensive and if you want to see though a window into an older period of a fascinating culture I recommend it.