The keen ridge is great. The shoe is rugged and there’s no worry about protection. Purchase them a bit large and don’t lace them up super tight. They’ll stay on and feel good.The flex accordion, while just darling in the contrast color, is a total gimmick. I can’t tell at all. I am a little concerned about failure as it’s a piece of plastic and for my kids in BSA who are doing 40 mile hikes at high adventure camps, I’d send them in the waterproof Targhee instead out of fear of failure from the accordion thing. For me, it’s fine. I’m not hiking like that, I think gimmicks are fun, and I enjoy buying new things every few years.My only real complaint is the lousy insole. Garbage. Thin, hard, and they made my feet hurt just trying out the shoe inside while standing to wash the dishes and fold laundry. They say all over them eco friendly but not when they’re so bad they are just adding to the garbage. I threw them out. I shelled out an extra $40 and got the orthoheel Vionic Oh! Active insole and now the shoe is great. I stood for 8hrs straight on hard concrete for a BSA fundraiser and was the only one not complaining about sore feet, knees, and back. That was mostly due to the insole change up. Cute, substantial sole, but for the price should have a much better insole.