Thanks for the information. The only reference I ran across for the update came about as a result of typing in 'software updates for 2010QX56'. A source came up through eBay and the
Price listed was $150 and instructions were it had to be done at a Nissan dealership(thus I expected a charge for installation).
Anyway, the experience I was interested in was whether the update, as you pointed out is confined to mapping, was providing the user with sufficient enough updated information to justify the cost, especially since it is five years old.
I am enamored with the vehicle. I drove it about 300 miles yesterday and loved the ride. I used the map function and the only difficulty I had was finding a way to end the route prematurely....I suspect there is a way to do that, but I am a newbie.....