Magellan Roadmate 1470

I purchased a RM 1470 for my trip this summer. I left Naples, Fl headed for Leeds, Al. I got me lost 3 times. Then in Winchesterr, Tn. it took me thru the residental neighborhood looking for Tims Ford state park. I then used my old one to get me there. I like the seven inch screen. I was wondering if any of you have used the magellan 9212 TM? Am returning the 1470.

Thanks