My 98 GS4 has factory nav. Cons:like some said it "looks" older than most all of the aftermarket units and you need to have an expensive hard drive swap to update. Pros: it is accurate and the touch screen functions for audio, climate, etc. is convenient. Another pro is the resale value, if that even matters to you. My screen just went BLANK yesterday which SUCKED HARD. After truning off and then on again it worked fine then wouldn't start an hour later. Just bought a new battery - hope that's the cure.