Novice runner, started training for a full marathon with different pair of shoes and started developing knee pain and Achilles tendon issues about half way through my training. I have flat feet and am a definite over-pronator so needed a shoe with more support. Finally bit the bullet and got these since they were recommended by my local running store. Within 2-3 weeks of running with these my knee and achilles  issues were resolved. I could feel a huge difference in terms of support and cushioning. My stride improved and even my time got a bit faster. They have already got me through my first half marathon and hoping they can help me accomplish the full in a few weeks. Have put a lot of miles on these so far and they look and feel like new. Did take a few weeks to break in but not unlike any other quality running shoe. Overall, highly recommended.