Grande delusione! These plastic pieces coming from the keys are very flimsy. Unfortunately, these shoes had a manufacturing defect where one one the shoes ( the left ) has a tongue that is significantly longer than the other. I am buying another pair though, I got used to the comfort and mainly wanted a sole that is carpet friendly as well as does not leave marks on my white floor in the kitchen. It works perfectly, connection is great volume is adequate and I can run a guitar and a microphone (with a splitter) through the microphone jack, and the background tracks through Bluetooth. something you feel the manufacture should have done beforehand. We ordered 3 of these (And they aren?t cheap) & they all are all evenly, 1 foot too short from edge to edge! Auch die Optionen Verkehr, Indoor und Outdoor sind sehr gut abgestimmt. Great Value. While they arent cheap I would have gone through 2-3 pairs of other name brand flip flops by now.