The shoes run half a size smaller than most major brands, although even major brands have significant sizing variations in models even from year to year. However, I now have five pairs of Brooks and they are all consistently half a size smaller. You immediately realize that all of their shoes are completely predictable. and super comfortable. These are excellent running shoes, very well constructed. For me they are very durable. To me, some of their colors and styles seem a bit boring, which others might like more. I was able to find appealing colors on two of my favorite models, the Launch and Ghost series. But the point is still performance, and they work well. They are light, stable, well padded and comfortable. Even the first small pair I bought works great with very thin socks. I am very happy with the shoes and will stay with Brooks.