Saved my knees.
As an avid backpacker who has had a number of sports-related knee injures, these poles have paid for themselves in comfort time and time again. As mentioned below, they aren't the lightest pole on the market, but I believe that the extra bit of weight is entirely worth it. The cork handles are comfortable and won't tear your hands up over longer trips like some rubber options will. The anti-shock system is great for trips with lots of elevation gain and loss where you can really pound your knees on some extended downhill stretches. I haven't had any issues with the collapsing mechanisms locking or losing their grip,