Has anyone installed the parrot handfree kit in their WRX. Supposedly you can wire into the factory radio without cutting wires using a harness and get hands-free calling through the speakers using bluetooth connectivity. You can also serve up music through a bluetooth enabled music player. It sounds cool, but I'm curious how painful it is to install and if there are any issues. I'll probably try it in the next few months anyway since I don't have the cash to go to a stereo shop to have a professional install.