The only problems Ive had since the purchase were my own fault. I had been looking for wireless earbuds for some time but really didn’t want to spend more than $100. C. The sizes on the soles are the same, but the left one has a longer toe box and is wider than the right one. So much more comfortable than normal birkenstocks. El sonido es excelente, se escuchan bastante fuerte y el bass no se distorsiona aún cuando les estás exigiendo el máximo. Listen up Ladies! I di let the stand sit (no bike), overnight, so that the Loctite would fully cure. I got these on a bargain, but I definitely think that they are worth the initial price. That means Apt-X codec for high quality music encoding and the newest/best Qualcomm noise cancelation for voice calls.