Works great, no issues. - BATERÍA. Idk why I didnt buy this sooner! As usually, the quality of Isotonic is 5 stars. Dabei hat sich nicht nur das Logo, nein, auch das Band, welches komplett um die Sohle des Schuhs geht, gelöst. *When you first get these shoes be VERY careful when wearing them, they are EXTREMELY slippery. Sorry for the rant- if you made it to the end, good for you lol. It even included a small guide for letting you know the resistance lbs per band. so i did a little digging online and apparently this is a fairly common issue and others are reporting the same response. I had been enjoying these pods until one day they stopped getting dissolved and got stuck on my laundry.