I have to disagree with the phone are most accurate. Was in Missouri last week, Phone (both Google Map & Waze, which should be the same) didn't show the road we were on. Garmin, which I had updated the Friday before leaving had no problems. Even my 3 year old updated GM Factory GPS was better than the phone, this could have been an isolated case but before I retired, used Garmin every day in my job for a min of five addresses starting late in 2004 with a 2825. I never had it make a mistake, unless I made one in entering the address. Had a few hardware problems which they handled very quickly by phone. I still think Garmin is top line company in the map routing field.