Ive recently bought a good used Garmin nuvi 1300 for my job .I have a few questions for those out their using their smartphones for GPS ,is it a good matchup to a GPS standalone?If you use the GPS option are you using alot of data time monthly ?An interesting point I found upon after researching ,for or against a standalone, is that some companies are requiring it for employees to have it on their company smartphones ,a tracker app can be implemented to keep a look at your location at all times,A Brave new world.