It was a gift for my wife, and I haven't heard anything negative back after she used it.  I would have if there'd been anything negative, so it must be pretty good.

I am so glad I continued to browse through your website. I had never
heard of this product. It makes working out  in the pool so much more
fun. I really never have any time to listen to my music and this works
out wonderful. Reception and sound are great. Don't know what I did
without it.

I love being able to listen to music while swimming! this product works great- the only challenge is getting the right size headphone pieces so they stay in your ears!

The H2O has met my expectations.  It works well and convenient to use.  I have only been using it for the last 3 weeks, however, I swim 5-6 times per week.  Based on this usage, I am reasonably assured that it will maintain it's watertight capability.  The sound is reasonable but not exceptional.  A swim cap is required to keep the earphones in place.  I knew that going into the purchase.  I can't recommend this to friends because most are looking for a watertight enclosure for the new ipod shuffle.  We may have to wait for that.

The H20 Audio Interval is the best thing that's happened to my swim workouts!  Putting them on and taking that first stroke was so amazing!  I didn't think it was possible to have so much joy while swimming.  Because my ears are small, I'm finding it a challenge to find the exact ear bud fit ... do a lot of adjusting of my cap/ear buds/goggles.  When the alignment is correct, the sound is great.  I've only had it for 2 wks so I'm hoping I find it soon!  When bilateral breathing, the buds slip around a lot.  The sound does cut in & out frequently.  They are great & am glad I got them ... just need to figure out the correct position & hope it stays put.

I swim 3-4 times per week and sometimes it does get boring. To be able to listen to my favorite songs while swimming is incredible. Not only that but the different size earplugs keep my ears fairly dry. If you are a swimmer you need to own this product.