I use both but prefer SanDisk for the gopro session.
I usually put the smaller lexor cards (16gig) in my fatsharks. I think I see better performance from the Goggle dvr with the smaller capacity.
I track and save both gopro and dvr vid... Its like a montra to be sure.
If it crashes I want a replay if only by vid.
you learn by watching vids of what you did right and wrong.
Nate and I rewatch and pick apart vids from the day.. err we put on good tunes and enjoy it after the fact.
what a ball