I bought these shoes after a bad purchase of a pair of Asics. I walk on a treadmill up to 6 times a week, and the Asics literally fell apart after 2 months. I purchased these Brooks shoes in Nov. 2011, and they have held up very well. My feet are flat, and I occasionally have heel pain, and these have helped those issues when I walk. I will re-purchase Brooks shoes when I need another pair. I highly recommend.