While reading the material, I found myself exposed to many traditions that may have taken many books or years to discover. The Shambhala tradition is well discussed and overall I enjoyed the exposure to several other ways of thinking and seeing.
I should preface my comments by pointing out that I have an extremely limited familiarity with the Shambhala warrior training tradition, so others who are more familiar with it than I may be more qualified to discuss the merits of this book. However, on the whole I did not care very much for this book and wouldn't recommend it. The authors jump around from one spiritual tradition to another which would be ok if some sort of coherent theme emerged as a result - but most of what I got was confusion. I find it strange to see Zen used as a justification for the sort of cosmology being put forth here - which, it seems to me, is extremely complex and full of spirits, dralas, shamans, etc. From a zen perspective, it seems to me that what this book is about is "adding legs to the snake" - in other words, putting forth a confusing and unnecessary mythology. I don't deny that everyday life is sacred and mysterious - but I don't think it's anywhere near as complicated as the authors seem to think it is.