First off I want to say how much I love the navigation system. I can't imagine myself buying another car without one. I'm in the market for a new house and it's been invaluble in helping us locate these homes (just type in the addresses and off we go). However, I've noticed recently that the navi has been off as much as a block to my point of destination. When I first got the MDX it was very accurate, but recently it's been "drifting" off. I was wondering how close to your point of destination does your navi bring you and is there a way to adjust this or should I just bring it into the dealership for adjustment?