Very good, but be careful ...

The headphones surpass my expectations. Great design, great sound, good service. But you have quite "cautious" or skillfully swim elegant, so they do not push out a piece from the ear canal and water enters. Even if this happens it makes the headphones but not from, you only hear nothing as long as the water is not removed.
I am sorry to report that I recently stayed a the rubber plug in the ear canal and I had to go home to let me help from his wife and tweezers. But it was probably my fault, since I probably not properly pinned up the plug on the device and then pressed very firmly into the ear canal to prevent water ingress. The small part broke away from the receiver and got stuck. Not very pleasant, but to remove with tweezers easily.