Navi ex factory or later ???

Hello, one question concerns me and I would like to hear the opinion of the forum. I intend to purchase a used XC 90. Now the Gretchen question is with Navi or without? Beautiful is the retractable display at the Werksnavi. Is simply chic and it does not disturb any cable salad or suction cups on the disc. Another clear advantage are the wheel sensors, which make the whole story even more accurate … … but otherwise … for the extra charge you get already a good mobile Na vi. Maps are almost the same anyway, since there are only (I think) two manufacturers. It’s a little bit more inconvenient, but you get to the destination and I’ve never missed an exit 🙂