I find this concept interesting.

http://allmagic.com/allmagicreviews/allmagicreview08.html

I am not passing judgement on price-quality-frequency, or brand.
I just think the IDEA is cool. It sits like a pen in your pocket then can be removed as a handheld for speaking to a spectator.
I am sure it's too good to be true, but the "concept" is excellent in our business.

It is a neat idea, I intend to look into it further. I've always had good luck with AKG equipment, I don't know them to produce sub-par audio apparatus, so I think this could be a nice bet. Naturally, depending on one's needs, usefulness will vary.

Kevin

You are better off getting a good quality lav.

The reviewer has already covered many of the good points about the system. I don't agree with everything he's said, but everyone has their opinions.

None-the-less, bear in mind that you can't change frequencies with this system. If you always play one city, AKG's Web site can help you to select a system that'll avoid TV interference, but that still won't protect you from any other interference. A "frequency-agile" system that will allow to choose between multiple frequencies at your gig is a much safer bet for interference-free operation. Still, though, it's a matter of looking at all the pro's & con's, and making a choice based upon your OWN needs.
Cheers!