Ok, this weekend I went camping in the mountains, I knew that the cellphone connection is worse to none to total nonexistent there, however, since I started driving from SF it must have loaded all my road into the phone virtual memory and I had no problem seeing map even in the low phone signal areas. However, when I started coming home I could not have GPS capability based off of gmaps for almost 80 miles. The phone connection was just not strong enough to provide 3G speed to load my road directions or maps, it kept telling me that it is loading road directions for more than one hour. If I would not know the road I would be lost, Google Nav was USELESS. Don't get me wrong, I think google Nav is very good, but they can make it better with some simple additions. I would even pay for it: 1. Make maps available offline and full GPS guidance available without data connection. 2. Make an option for auto avoiding traffic. I mean what good is it for me knowing that traffic is ahead of me if I don't know how to avoid it? 3. Able to save favorite places without going through the hoops of "starring" items.