So I've been using this device in the GS for awhile as my wife and it really is amazing. For those with an iPhone with Siri this small device links through your bluetooth
and you can talk handsfree to Siri through your car all with the touch of one button.
I find SIRI to be a better to use than voice NAV and its easy for example to play my songs, text etc through the "Mobile Home". it is real tiny and in black so it clips perfectly on your visor.
It really keeps me talking to the phone instead of using the phone with my hands which helps with safety and keeping our eyes on the road. Overall highly recommended!