For a book claiming to reduce all the math and complexity out of combat, it's astounding how it manages to do exactly the opposite of that. Each and every narrative combat roll is split into different stances, divided by needlessly minute factors that increase the math exponentially, and make 'narrative combat' take 5 times long as normal. The sheer amount of addition, subtraction, and division (?!) applied to a single combat roll is mind boggling.
For example, every single feat is translated into a specific bonus or mathematical application to your narrative combat, including a specific narrative phrase to accompany it. If I have to flip through a book just how every feat is operates differently to modify a single attack roll, how is that quicker than just using my normal feats? If I have to repeat a specific phrase to describe something as mundane as feat, something is seriously wrong with me and my ability to "narrate." Some combat rolls have over 5 phases to pass through before being resolved, at which point you throw up your hands and have to ask yourself "what's wrong with just a basic combat roll?? What fever addled brain could possibly think remainders from division makes combat easier???"
By far the worst purchase I've made on DriveThruRPG, and I've been using this site for over 5 years. If you want this much math to speed up your combat, just a buy a 4th grade math textbook and make everyone at the table practice their long hand division. It'd be faster than running combat using this atrocity.