Fifteen years ago, I was desperate to save my knees and my lifetime running passion. I tried Pose because at that time, it was the only game in town to dramatically change running form. I bought the book, the DVDs, and then I practiced diligently for several months. Right... months.
Two things happened. 1. The Pose solved my knee problems. 2. I got slow.
I then examined the Pose Method closely to see what I might be doing wrong. I discovered that the comparison of the Pose to how animals run (to claim its efficiency) were biomechanically incorrect.
The Pose (as I learned it back then) requires you to land on the ball of foot and then quickly lift it. There's no flex or push off with the foot. The Pose Method claims this is how animals run. In reality, in the rear leg of animals, the "heel" is actually the lower leg. Dogs land on their paws (toes in human anatomy), then they flex their lower leg (heel in humans) to push off. This push off is entirely missing in the Pose.
When I added a slight push off to the Pose Method, my mile pace increased from 7:00 to 6:40... a whopping 20 second increase with only a slight form change. It then took another 3 months to get strong enough to handle the push off.
TL;DR
Bottom line:
The Pose is biomechanically incorrect. To run fast, you must push off. If you have career-ending knee problems, the Pose might solve them, but it's not the best technique for forefoot running.