I would say YES, it's really a no brainer if you are off by yourself or even with mates, especially off the beaten track. Obviously there are the other systems DeLorme etc. Depends on your finances really.
I wouldn't go anywhere here in Australia without setting mine up for my loved ones to track me. Not only for the bike but I go kayaking, camping in some strange places.
Buy what you can afford to run, a must have before all the other Farkles.
Also I carry a personal distress beacon connected to my body.
I know nuffink, I see nuffink, It was not me, I was not here.
2015 Wee Strom "Piglet"
Givi crash bars, Barkbusters, Ravetech Bash plate, Ravetech Rad guard, Ravetech over dash Ram mount, Hyperlite flashing brake lights, Madstad bracket and screen, Augustus wind deflectors, Spot 3, UHF two way radio, Garmin Zumo GPS, Starcom intercom, Fuze block.
SW Motech Centre stand, Suzuki power outlet. Bike Alarm, Screaming Banshee horn, Led Flood lights, Tool tube, Andy Strapz Expedition soft panniers and frames.