If you are considering poles and possibly Pacer Poles, the very best reference comes from another recent post, that asked whether anyone was willing to trade his or her pre-owner Pacer Poles? What you see is that there have been ZERO reactions to the thread.
My knees are rusty and I would not part with my Pacer Poles for the world. They are the difference between walking and not walking the Camino for me. Once Iberia at Madrid airport did not return them in the odd bagage (they told me to go to my Madrid hotel (huh, I only have a midnight Alsa bus to Burgos?) and wait, but instead I camped with my backpack right next to the customer desk and insisted that I would not leave until they retrieved them, which ultimately happened hours later into the night. Ever since, I check my backpack with the poles folded in it.