This is actually the second time I've read this book. But, like many books of a philosophical nature, you gain a little more, maybe a little different, insight on each reading. I can't speak to the quality of their translation, as I don't read or speak ancient Chinese. But, while reading the essays and commentary included in the book you get the impression that they have gone to great lengths to preserve the spirit of the original while making it accessible to a modern, English-speaking, reader. This is complex book, but I hope to at least pique your interest enough to seek out a copy for yourself.
Before reading the Art of War,(*spoiler alert*) it may be helpful to know that it isn't about war as most laymen perceive it. Sun Tzu advocates victory by 'taking whole'. Rather than obliterating the enemy, it's people, infrastructure, and resources, wouldn't it be better to win with all of those things intact _and_ on your side? Destroying everything in order to win only insures that you win a desolate state with a resentful populace and a lot of work to be done...a further drain on your resources.
The Art of War is comprised of 13 chapters ,each dealing with a different aspect of war, how that apect fits into the greater picture, and how each can help to achieve the ultimate goal of 'taking whole'. At the heart of taking whole is the ability to recognize, read and interpret shih, the potential in the current configuration of all the disparate pieces that make up now. Are the current circumstances propitient for action? If not, can they be altered to make them so? If not that, can they be altered to make them less advantageous to the enemy?
The idea of victory by taking whole is what has contributed to the Art of War's application to conflict resolution off the battlefield, as well. Lawyers, businesspeople, and generals alike have reflected on it's nuanced wisdom for years. There is definitely application for it in many of life's little grievances, even if only to give one pause to think before you act.