I have read this rule book several times now, and I can say that I am looking forward to my first game.
Like most items from D&P it is well supported via the web, with a willing group of gamers contributing to good discussion.
The rules themselves seem to cover the period quite well and have some interesting features. They are an advancement on Impetus, the set from which they grew, and have some good new ideas in them.
From my first impressions, I recommend these rules.