Been running in the Nike Zoom Fly Flyknit. Same carbon plate as the vaporfly but has the React foam it’s super soft and very cushiony like the vf. Yes I can definitely tell my legs are less beat up wearing them. Its basically the training version of the vaporfly. The first version of this shoe was called the Zoom fly which was total garbage with inferior foam. I have the vaporfly for racing and I agree with you they make a difference on my 50+ legs as well. Studies be damned I know the softer midsole on these shoes is helping.