Only used for a few tours but so far very satisfied. My previous knee pads had zippers so there is no way that I can go back. I was happy when IXS released these. I needed something lighter and more ventilated for long tours in the summer. They are considerably less substantial than my Ion K-pact and that is what I wanted. These are so comfortable that you will forget that you have them on. Protection feels adequate for normal riding. the protectors are removable for washing. The only slight negative is that they can move around a little. Could maybe use a bit more of a gripper area. Also I noticed that sometimes when the zippers close the teeth can misalign. Hopefully this will not promote durability issues or burst zips. So far so good and I recommend.