I've had my limited with nav for about 2 months. I've used the navigation a few times and it really seems like it has no idea on the estimated arrival time. I've previously had a Garmin and it was way more accurate. For example, we left for a short trip this weekend, initial arrival time 5:00 pm. The time kept dropping a minute or so probably due to my speed - similar to my Garmin. But, about 20 miles out from our destination the arrival time starting dropping rapidly - we actually arrived 50 minutes before the initial time. That is a huge difference. I wasn't driving that much over the limit! Also just to test it I navigated home from about 3 miles away and it stated I would arrive in 20 minutes. Is it just my unit or my map area, or are others seeing this too? It's really useless for planning since it's so off. Thanks.