AWESOME ADAPTER!
I bought this adapter for my LG Voyager Black Phone (Verizon Wireless) so i could listen to music with my standard 3.5mm headphones and i must say i'm really impressed. it sounds crystal clear and it's very small. so for $1.99 why not?

Works Perfectly
I ordered this product a few days ago, and it works perfectly! (so far) I'm using it as I write this review too! It provides crystal clear stereo audio for me, (although the left and right stereo sounds are switched due to my phone being LG) and I can't see the design flaw that someone else mentioned.
The product shipped quickly-four days with standard shipping. Overall, well worth the few dollars that this product costs. :)

Fourth time is a charm
I got this adaptor from Radio Shack for my daughter's Sanyo Katana phone. Every time she bent the cord slightly it would crackle, so I took it back and tried a second one. The same thing happened. Then I went to Target and got a different style, a retractable one made by Just Wireless. It listed a number of phone brands on the front of the package, including Sanyo, and the package stated it was for stereo earphones. But the sound only came through one earphone, so I took it back. I was out shopping and went by a different Radio Shack and thought I would give these one more try. This one works just fine. Even though it works I only give it 3 stars because there is an obvious quality control problem, and the flexible part is not of the same quality of any earphone cable and it is going to go bad after some amount of flexing. NOTE: To get stereo sound you need the adaptor with 3 rings (like this one), there are similar looking adaptors with 2 rings, they will only give sound through one earphone, when used with the Sanyo Katana anyway.

Doesn't work with Nokia phones
Nokia phones are 3 ringed, but for some reason, this will not work on Nokias - it does work on Samsungs though.

Works GREAT with cell phones!
This cable will work with any cellphone that has an mp3 player. The 3 ring, 2.5mm male-end will plug into your 3 ring, 2.5mm female-end of your cell phone. The 3.5mm female-end of the cable will except standard head phones, FM Modulators, or other 3.5mm male-end cables.

I plugged it into my cell and worked great in stereo! You want this 3 ring cable to work correctly with your cellphone-mp3 player.

Shipping was FAST, too! A must buy!