For probably the 15th time in the last six months, I just got lost because when I downloaded a route from MapSource to my Zumo 450, the unit decided on its own volition to add detours. This is truly pathetic that it cannot successfullyperform the most basic navigator function. As soon as I can, I'm replacing it with a Tom Tom. I'll never own another Garmin product. I've attempted to get support from Garmin on this but that is a scam--they don't actually reply to email support requests.