I tried the Finis SwimP3 (a couple models) and was very unimpressed with the sound (no bass). It also doesn't use iTunes if that makes a difference for you. Now I use an H2O audio case with an iPod Shuffle and H2O audio flex headphones ($20 on Swimoutlet). I put everything under my cap. I made some modifications by using the 'plunger' type earpieces like the ones featured here http://www.swimoutlet.com/product_p/17460.htm. Now I can use the same shuffle I use when running and never have to worry about the earpieces falling out (total cost ~$100 if you already have a shuffle). I rarely use this in open water but I can still hear propeller sounds (because of bone conduction). If I wear this when I swim at the pool with my wife, I just leave one earpiece out so we can chat at the end of a set.

Without the MP3, I would be bored senseless in the pool--best swimming aid I have ever used but that's just me.

I am very tempted to try the after-market water proofed shuffles that can be picked up for <$200. That would result in much less 'stuff' under my cap.

I tried the Finis SwimP3 (a couple models) and was very unimpressed with the sound (no bass). It also doesn't use iTunes if that makes a difference for you. Now I use an H2O audio case with an iPod Shuffle and H2O audio flex headphones ($20 on Swimoutlet). I put everything under my cap. I made some modifications by using the 'plunger' type earpieces like the ones featured here http://www.swimoutlet.com/product_p/17460.htm. Now I can use the same shuffle I use when running and never have to worry about the earpieces falling out (total cost ~$100 if you already have a shuffle). I rarely use this in open water but I can still hear propeller sounds (because of bone conduction). If I wear this when I swim at the pool with my wife, I just leave one earpiece out so we can chat at the end of a set.

Without the MP3, I would be bored senseless in the pool--best swimming aid I have ever used but that's just me.

I am very tempted to try the after-market water proofed shuffles that can be picked up for <$200. That would result in much less 'stuff' under my cap.

My Girlfriend just gave me the Finis Swimp3 as a Christmas gift. Unfortunately, I must have a weird shaped head. The sound was great but it caused my goggles to leak or if I tightened my goggles it caused too much pressure on my face bones...I found it uncomfortable.

But as a previous poster said, there are no headphones, there are just two plastic pieces that attach to your goggle straps and it sits on your cheek bone. The reviews are almost all positive. For me it was just to annoying. I found myself playing with it more than just swimming.