History should, first, be a story that is interesting and informative, especially when it involves such a vibrant and exciting era as the Ancien Regime.
This book fails at the basics of creating an readable, organized, engaging history, and - rather - bogs the reader down with needless detail while omitting necessary background information. There are numerous blatant and distracting errors (despite the author's generally excellent scholarship) and at least one major conclusion is clearly erroneous (the author finds the ultimate effect of John Law's bank and the South Sea Bubble on the economy to be positive - for a really insightful view into this event, see Charles Mackay's, "Extraordinary Popular Delusions and the Madness of Crowds").
There was a single apparent bright spot in the book - the actual quote of Louis XIV speaking to the 5 year old Louis XV on his deathbed - and the source of that, putatively authoritative, quote is not even documented, and is therefore useless.
This book is actually harmful, in that it discourages the reader from actually learning about an important and exciting era in western history, while offering little of value in return.