Has anyone used this combo? I'm trying to decide between getting the chip for my Garmin or putting it on my iPhone 6. I haven't been overly impressed with the battery life or the touch screen on the GPS but it's built like a tank and would be cheaper to replace then the phone. I don't want to have to by a new GPS this year so this is my only option. I'd have to get two states for the phone as I'm looking at Colorado and Montana so there isn't a big cost advantage over one or the other.