To use a GPS Tracker or not to use a GPS tracker? I have read many threads where folks use them religiously as a type of insurance in the event of a fly off and I have read where some swear them off like some sort of plague. I understand these units are relatively inexpensive and have a monthly service fee but I was wanting to here from the masses on this subject and see how many have faith in the phantoms reliability and from the ones that would not fly with out it. Please feel free to share as much insight on the subject as possible. Pro's and Con's. Thanks so much...........