Love this shoe
I have had this shoe for three months and wear them every day including gym, walking. The shoe is comfortable and stable. Great communication from bprimal during the process as I needed to speak to someone regarding stock.
After being very happy with my ST-3, I found the ST-4 inferior. I needed to size up which meant an exchange and the toe box is not as deep, so my toes don't have the space they do with the ST-3. I decided to get another pair of TOPO based on my past experience, but was disappointed. The quality is fine in all other ways, however I won't purchase another pair unless the previous design is reinstated.