ETA: Note to the comment on roaming and using up battery.... I have unlimited data so no worries there and always have my charged up Mophie with me in case I need any extra charge. I was just in a very rural area and never had any issues with cell coverage, data overuse or battery issues. I love using my ONE device for everything!
IF anyone does not have a Mophie, you need to get one. I paid about $130 for each one that we have and keep charged up. GREAT extra chargers and they will charge 2 items at the same time (ex: phone/laptop/IPad, etc.) Worth the $$
************************************************************************************
I never use the GPS in my car for directions...... I just use my phone. Same with daughter and hubby and we all have top notch GPS systems in our cars.
I know the system in my car is top notch and when I go in for service it gets updated but the only reason I keep it is because I have the SOS button which will send help if I push the button or will send help if I do not respond to the vehicle alert when help is notified.