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I use my iPhone to navigate. I like having the map on the screen while driving as a point of reference. Nice to be able to glance at it and quickly know which way is north. Also "looks" good having the map up.
While searching for a car, I didn't care if it had nav or not. I like the ability to tune the equalizer and bluetooth phonebook, even tho my phone book is HUGE. The potential ability to hack into the signal is always nice incase I desire to in the future.
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