Great navigation system, it's what you see advertised now on the Acura TL. Fun to drive and to talk to! Fast off the line and great on the highway. I've been getting about 24 mpg on average with the V6. Everyone who has driven in my car has had very nice things to say about it and are floored by all of the "toys."
The navigation system/CD changer/XM radio/radio all driven through the main computer screen. Everything is very well integrated.
The only area that I can see that needs some improvements are in the Accord's cornering, it could be a little more nimble.