I've personally only used the Dual one. Hopefully someone else has used the plug in one and can chime in.Originally Posted by namlow
I was reading some reviews about a gps that plugs in to the pin, don't remember which brand, and some of the negative comments were about accidentally knocking it out. Plus it may be a little more awkward having something sticking out of the bottom of your ipad. One advantage to the Dual one is that I can put it on the dash to get a better satellite signal as even the roof of the car can diminish the signal slightly. It's not cheap, but at least you can avoid buying 3G/4G in the future if your sole reason is to have gps.