I'm installing an aftermarket navigation system on our IS300.
I'm debating between a few different units at the moment and it seems the TomTom offers the best product for the money. Handfree calling using Bluetooth technology, voice directions with turn by turn, touch screen, and a factory 2 year warranty.
Anyone have any experiences with different navigation/GPS manufacturers that can give a good review on different systems and such? How audible are the phone calls and directions thru the navigation unit?
If anyone works in the install field, how much would installation be for something like a windshield unit? Hardwired into it's power supply vs using the DC adapter for power supply?
Any help is always appreciated.