So far, I am very pleased. I clearly have a firmer base to support my foot. The much wider sole on the 4E shoes and the arch firmness across my foot offer a more secure & balanced stance laterally. I don't seem to sense a left/right rolling tendency. If this continues to show benefits, I may call for a duplicate to stop transferring between different pairs of shoes.
We have bought several pairs of shoes from Mike and Rosie so we are return customers. We find that Mike's knowledge of skeletal "mechanics" is as good and perhaps better than that of some physicians. They are both perceptive about individual shoe needs and are good business people.