Yea, that is a weakness of the NAV option, it doesn't have any intergration like that, and it takes far too long to get updates (5 years). Richard
Just got my Garmin and like it. Costco didn't offer anything like an upgrade tho.Not to mention those DVD upgrade can be expensive I hear.
Even my dealer told me not to get the NAV- though the backup camera is cool.
I stuck with my Garmin which I got a lifetime upgrade option for $79 or so on sale last year. Upgrades 3-4 times/yr.