Summary: Generally a very solid unit. The biggest issue that other reviewers have pointed out is the fact that when you first turn the unit on, it doesn't pick up the satellites immediately. You have to wait sometimes several minutes for it to sync. The way around this is to go to the GPS info screen right after you turn it on and let it sync (this takes less than 1 minute) and then enter your address and hit NAV. You'd think there might be a software upgrade to fix this.
Summary: My stylus could not be re-calibrated after 1 month. Defective screen. Not sure how common this is anymore. Customer service/support was poor. Never returned any emails or phone calls. Finally spoke to a real human who told me to return for an exchange as they have been having problems with the touch screen. When the unit worked, it gave good directions and was easy to use, once you learned the ropes.