Over All Rating Reviews : 
This seems the only quality product for those who seek reliable waterproof armband. Fits well on the arm, light, a little bulky. Now the things to improve:
1. (Noted by all owners) - hard to insert iPhone. I've noticed that the problem is not even due to a lack of space or narrow opening, no, the problem is the transparent shield! Its material is purposely chosen to stick to clean and glassy surface (which is actually convenient when iPhone is already inside, but REALLY-REALLY sucks when you are moving it in or out).
2. The start button of iPhone is really hard to access. Only a small part of it is under flexible screen, it's mostly hidden under the rigid protector.
3. Even though headphones connector looks the same as iPhone's original (4 sections) it does not seem function well. I've tried the original iPhone headphones with microphone and checked very well whether it was fully plugged, but microphone did not work anyway.
4. The latch which actually closes the opening is plastic and a) really hard to open; b) seems susceptible to an accidental bash (it's on the arm, almost shoulder...).
5. The hermetic container swells on the sun. Actually every time I had to re-open it to let the warm air out, otherwise it's like to play with your iPhone touch screen when it's inside a balloon. I think it would be easy to build in a simple pump with a valve. The ability to pump out air would actually do a great job to tighten iPhone fit within the container and make touch screen contact ideal.
Overall pretty good product with some space for improvements.
Get more detail about
H2O Audio Amphibx Waterproof Armband for iPod nano, Medium MP3 Players and Phones.
