Heres a link to them, my band are thinking of upgrading our desk so all of us bar the drummer can go wireless with our own monitor channels. Just want to know if anyone here had used them, and if they had any opinions? http://www.thomann.de/ie/akg_ivm_4.htm
Only used them as a monitor tech, but they are really good. More headroom than most IEM's, easy setup and they sound as good as any other systems. If you've got the money I say go for it.
Our singer has been using them for about a year (with the included headphones) and has never complained. Btw, she hasn't had prior IEM experience with other systems.