They endured a lot of rain, beaches, pools, walking, and running. It feels like an Alpha build and is so buggy that everything good about this mouse is overshadowed 100% by this terrible piece of software that Logitech forces on you. Look no further, this one here is great. They were kind and courteous in their response. In conclusion, I understand why some people would want to return these after putting them on and hearing the sound for the first time. I like to wear "Mary Jane" style shoes due to several medical conditions -- many involving my feet/legs and gait/balance. Now that my husband’s size was corrected, he’s very happy with the fit and says that they’re very comfortable! It is adjustable as per your height need . This indent *hurts* and feels like a bruise. Likes:- The bass is deep but isnt too loud (comfortable).