Victor Mair is amazing! I own an older version of Sun Zi, and I have to say hands down that this is much more readable and insightful a piece of work. Mair is an excellent writer in his own right, and his expert scholarship is clear from the authoritative introduction, some 55 pages long but easy to read. I have devoured this book. It is hard to put down and it doesn't bog down. His translation is superior to the older Shambala edition. I enjoyed the discussion on putting the treatise into a historical and military context. Even the forward by another author, comparing Sun Zi with Clausewitz, is excellent, thought-provoking work. I think this moves Sun Zi scholarship forward but in a way that is also perfectly readable to the layman. Mair gives the more serious scholar ways to get more into the weeds in the notes section and in references to more academic papers he has done on the subject, which is fine by me.
I highly recommend this to anyone interested the Sun Zi, tactics, and Chinese philosophy.