The microphone turns iPod Touch into a recording device without the headphones (with the micro iPod Touch) must be plugged. But as the main reason to buy, was for me that I can use the Touch as a guitar tuner by an "iPod app". (Tool there are free from the company. Gibson) Should be no advertising !!! The voice recording is unbeatable for the price. The Micro was recommended to me, and I will also recommend witer. For the price you can not do nothing wrong.
Now for the negative ....
(Nix)
Except that maybe a plug-in module with loudspeaker and micro should be invented. Then would be "Skype" and to use, without cable clutter ;-) But then over the whole bottom and not only as a "nipple"