Desktop part is free and its setup is as easy as one could imagine.
Works pretty well for me, ad-hoc connection is supported (for those who do not have a router).
I guess those of you who gave the app one star rating didnt realize that desktop part is needed for the app to work?
10.7 Lion support? Give them some time, please.
_AeroPlane_ about Headset, v1.1.14