I will be purchasing a 32gb 3G Ipad very soon, and also need a GPS for my car. Can this version be used the same as let's say a dedicated Garmin GPS unit, with turn by turn directions, given the right app? If so, how do you use it visually as it could not be attached in front on the dash as you would a small Garmin unit. I would like to save myself the $150 or so for the stand alone GPS, but if there are drawbacks to using the IPAD I might spend the extra $. Thanks