I'm very excited about the Finis Duo! The underwater MP3 player exceeded my expectations. It was pretty simple to download music to the device. The most time consuming aspect was I used iTunes and had to convert the files to MP3 files, but instructions were in the manual and simple to follow. I found the manual on the Finis website. http://www.finisinc.com/Duo
The Duo secures to your goggles and rests along your cheekbones. I liked this a lot as ear buds are not comfortable to me.
I was blown away by the sound quality! The sound was so clear!! Even underwater where I expected it to sound muffled it was very crisp!
Swimming laps sometimes becomes tedious to me, but listening to music on the Duo helped break up the monotony! I really look forward to being able to listen to music as my swims will be getting longer and longer with Ironman training.