...just bought a Garwin 2620. I'm from NYC and just moved to North Virginia and have been going back and forth quite a bit. Just this Saturday on my way up I95 I ironically got a chance to use it. An accident apparently blocked all lanes in Delaware. I was at an exit and just turned off. The Garwin detected the route change and guided me around to the next on ramp. I went from virtually stopped traffic to an empty highway ahead of the accident. Pretty cool.

This weekend I'm inputting the addresses of all of my autocross venues (from NY down to Va) and every Track in the region from Mid-Ohio to Road Atlanta. It should help if I

 

Thanks for the feedback everyone. Based on what I've read I'm going to opt out of the Acura nav system and save the $2k. If I feel the desire/need to get one down the road then I'll get one of the portable ones so it can be used in multiple cars.

 

Check out your local Dollar Store for a product called "Goo Gone". Little clear plastic bottle with a yellow liquid for, you guessed it, $1.00. Should work like a charm.