I have had Blue 940v4 sz 13, 2E for 10 months now. I walked them about 900 miles. The kilometers covered were on asphalt and concrete surfaces. Due to heavy use, the tread is worn in the toe area. However, the shoe is still responsive and comfortable to wear. The toe box is roomy and the shoe feels light and breathable overall, which is hard to match in the stability category. I'm a tall man with very flat feet. It's nice to have color options other than black or white in a niche shoe category. This is my first pair of 940s and I look forward to getting a new pair in the future.