I've only used them twice so far, but so far, they're awesome. I don't notice them at all while kitesurfing, which is great. One concern I had was that adding another piece of equipment with cords would be annoying or feel less safe, but that isn't the case. They stay put, and I don't have to clean or adjust them while riding. The only thing I notice is that I'm not blinded by the sun, and my eyes don't hurt afterwards.