I just had the radio with gps installed today and so far I am completely satisfied with this purchase. I had the system installed professionally and the warranty may be extended for an additional 2 years which will cover the parts and labor to repair the unit. However, I would like to confirm this extension with VMInnovations 'cause i do not know if the Geek Squad of Best Buy is an authorized dealer.
The sound is great as I can customize the equalizer to my liking. Navigating using the screen is so easy and one can even adjust its touch sensitivity. GPS navigation is almost similar to equivalent units and I am confident that it will function the same way. One last thing, the unit has a built in interface to connect the unit to the steering wheel controls which lessened my expense.
Even if I haven't gone into the rest of the unit's other functions, I am pretty sure that this was a good buy and would recommend it anytime.