That's nice that they update the navigation map data. Much better than dropping $150 for a new DVD!
Yeah, it was nice of them... However I don't know if they always update it for free. I wonder because they were down there changing all the components (bluetooth module, which resides in the naivation "brain center") they did that as well. Also the software update was also free, but not required as there was no problem with the old one besides customer complaints.
I haven't heard Nissan willingly updating the software of their system to allow people to make changes while driving... so