I have high arches and tend to under pronate (is that right?).  I needed something that would give me enough support for running and these shoes are amazing.  I owned a pair of Saucony shoes that did not have the same level of support and I actually twisted my ankle a lot running on trails and near the beach.  But with these shoes?  I haven't had a single running injury. It's great! It took a little bit to break in the shoe.  The heel part rubbed my ankle a bit when I wore low ankle socks, but they eventually softened up and everything is comfortable now. I feel like I can run forever in these shoes. I'm going to stock up on another pair so that I have another pair ready when these give out. I'm converted.