I have the latest version (2015) and it cost $79. You get an activation code that you take to the dealer, and they load it to your car's hard drive for $90 fee.
It doesn't change the looks dramatically, I don't think the system looks dated. Dunno why so many other people do. I think it looks just fine and it works very fast.
EG: I live in FL and had to drive to a small town in PA. I used the touch screen to enter the zip code, then by the time I had the street half-entered ... BAM the exact address showed up and the lady in the glove box was ready to go in less than 2 minutes. Turns out she was spot on and even warned me about traffic info along the way.
If I was single, I'd give her a go, LOL.
Here is the link if Ilya and I have changed your mind:
http://infiniti.navigation.com/product/ ... nitiNA/USD