Others say...

"Did what I needed. Seems like good build quality, a little expensive though"
I bought this because my computer's headphone jack is really strong, and my headphones are really sensitive, so I had the problem of having the volume on the lowest position just to have it at a comfortable level.

So I just plugged this in, and used the inline volume control to "dim" the volume to suitable levels, and turn up the volume on the computer. The sound is better too, because the volume level of 1 on my computer has a lot of internal noise.

A few things I noticed. One, the volume controls have almost no friction, so if you bump the slider, it will move pretty easily, so make sure the max volume isn't going to make you deaf before you use this in an environment where you might bump the headphones.

Second, this works like any passive volume control. It "dims" or attenuates the power level to make it quieter. If you want this to amplify your sound, it won't. Also the maximum attenuation is not going to mute the sound. It goes to about half the volume of the max (that fraction might be dependent on your headphones).

The reason I give it four stars is that it's a little expensive for a couple potentiometers, and some plastic. I know it couldn't have cost ten bucks to make this. More like $0.30. Oh well, that's what I get for not making it myself...

"Good, but...."
This product is great in concept- it fills a necessary niche with individual volume controls (a must when two people share the same source), and performs well....except that the plastic housing for the jack is VERY weak and doesn't give like most normal headphone jacks. I was using it in an airline seat and snapped the housing beyond repair when I brushed up against it. Good product, but be careful with it...

"Good product"
I don't know what Baltimore MW's problem is with this product. It met my expectations. It lets me plug two sets of ear plugs into my ipod. It is not too bulky, the volume control is a very nice feature, and I have not found it slide out of the plug. My wife and I plan to take it on a long plane ride and I believe it will let us listen to music in peace while letting me not have to listen to music at her volume (and she won't have to listen at my volume).

"Poor Design, Flimsy Connector, NOT Recomended"
Before i describe this product let me say my Sansa E280 uses a GRIFFIN Centerstage Case + GRIFFIN TuneBuds (which are litterly repackaged earthumps....sad i thought i was getting an upgraded EARTHUMPS but not the case so going with crappy GRIFFIN TECHNOLOGY i grabbed this seemingly painless piece to help save the jack built into my sansa...
Where should i start?? this is a simple headphone splitter, and its pretty much just a good cat toy....the connector is not only BULKY, Huge plastic piece before headphone jack, which made me happy seeing it online but in reality it only prevents this thing from recieving a complete connection to any device and forget about it if you use a GRIFFIN case of any kind IRONICLY the "SMART"Share doesnt get a complete connection through either the Vizor or Centerstage which baffles me since ANY other Headphones fit with NO TROUBLE and both are GRIFFIN PRODUCTS not to mention the thing doesn't "CLICK" in it just slides , EASILY "SLIDES" out also....Then theres the VOLUME CONTROL...yeah it CONTROLS ITSELF sliding all over in your pocket, maybe they could've been stiffer or a press to lock system hell for $15+ ?? also doesnt turn the device your using either Full Volume or total Mute i mean RadioShack sold me the Rplacement Splitter that worked flawlessly for $3.95....STAY AWAY GO TO RADIOSHACK !!!! this thing is gawdy JUNK

"Purefunk agrees"
The Griffin Smartshare Headphone Splitter is a great product. My wife and I can, and do, watch movies together on my IBM laptop without disturbing the rest of the family. The dual volume controls is a great feature allowing total enjoyment at personal volume levels.