Even before I ordered my FP1 I started a project to make 60 GHz DIY sensors from an Infineon smartchip called BGT60. Since my FP1s do not work as well as I wished, I finally finished my first prototype last sunday.
When I enter my kitchen, my Infineon 60GHz prototype triggers much faster and better then my FP1. Unfortunately, I have, like some others here with the FP1 too, ghost-triggers.
If someone has fun to tinker with me, I would be very happy.