Fabulous, fantastic, amazing! No cables. No external device to carry your music. Everything in one place. Headpiece fits perfectly. Sound is great. Love that you can moderate the volume between songs to minimize the difference in volume level. This prevents the volume of certain songs from being too high or too low when shuffling songs from multiple albums with different recording levels. Great idea. I have only used at gym, travel etc. so can't comment on the water based tests. If this product needs any improvements then I haven't come across them yet.

I wasn't to sure when I brought this especially when it were described as waterproof, but there was nothing to worry about because it does work under water with excellent sound quality while I were swimming. My Walkman is great and the sound quality is great in or out of the water

This is a great device although it still has room for improvement. They need to make it louder so a noisy pool would be tough to enjoy. Also, needs improvement with the user interface to select music.