My car has a GPS, and I don't even use it. I use the WAZE app on my smart phone. It has real time updates, and it guides me away from traffic and gives me the fastest route to my destination. GPS requires yearly update that cost around $150. Everyday there are street changes, construction, traffic, road closures, etc, so the latest updates on built in GPS are already outdated. IMHO, the additional gadget, wiring, and satellite antenna for GPS are not worth it.