I was little averse buying the Boston 13 looking at the reviews on tight toe box. Yes, they're tight but comfortably to hold my feet for a tempo run. I didn't want to try anything else after my affair with Boston 12. Now with a Half Marathon in its kitty I can say it's very good pair of shoes of you are looking for a tempo trainer and even a racer, with proper socks. I enjoyed my 2nd fastest HM just today before writing this review. Of course, toe nails have slight pain even with runners knot. But the stuff cushion and overall comfort is great with the Boston 13.