These shoes are 100x better than my old ones. Andrew Vo summed it up very nicely. If you only run on a treadmill, then its not an issue. Definitely no problems with it and would recommend it to anybody looking for a good gaming mouse. At reasonable volumes (less than 60%), I did not lose situational awareness of skiers approaching from behind. I compared it to my originals def not the same. The closing stretch is particularly rewarding. Even the earphones are great - sound is super clear even if I keep my laptop volume below 40. It has a gel or rubber top which keeps it in place. The battery does last long.