I sometimes worry about what I might do if I ever get rid of my Passat... because then I might lose use of my Phatbox, and that would suck! Thankfully, at 125K miles, it's still going strong.
(and lately I've been getting a bunch of 'NO CHANGER' errors, with red/green both lit. I just unplug and replug and it gets going again).
Still, I really love this device.