Loved the product itself, just wish I ordered the correct size initially. Sehr cooler Holzschuh. love these slippers. Why would you advertise in the title of the product a J5 (big kids 5) when the product is a C13 (child 13)??! It seems sturdy enough to last a long time, and it looks attractive when I open my closet door. In terms of size and visibility, its comparable with some cars reflectors and tail lights. And I like the sound. ****** NOTE THAT THE CHARGING CASE FAILED AFTER THREE DAYS- returning for exchange. Now I am fit to be tied. The K245s dont seem open air at all.