Ran on the treadmill with the Nike Free today... Now understand my running is 8mph for 2 minutes tops, followed by a varied range of 3-6mph jogging.
The second I stood up in these I knee they were a running shoe, clearly intended for pushing off from the toes. When I started to put some weight into movements I felt my toes spread and my foot move differently than I am accustomed to.
It felt good. My muscles ache, but I feel very good. And if I had the strength and endurance to continue I would not have stopped. I put in about an hour between two runs at the gym.