I fell in love with the Glycerin 13. Once I used up 3 pairs, I had to try the 14. It's just as good, although I preferred the 13's look slightly. I bought 2 pairs: the lime green and the anthracite/blue. I am 36, run 3-5 miles 4-5x/week, and love the cushioning and plush feeling. Normally I am a big ASICS fan, but for now I am sticking with Brooks.