Jason M.wrote a review of Garmin Fenix 5X Sapphire on September 22, 2017
Familiarity: I've used it several times
Really cool functions, and incredibly fun. That said it's more of a toy than a tool. I spend multiple days in the backcountry at a time and the battery life on this still sucks (though not as bad as Fenix 3). If you need this for little 2 day trips, you won't be let down. For the rest of us, it becomes dead weight by the end of the trip. I had to return mine and get a Citizen Altichron. No bs, just time, compass, and altimeter plus it's solar. When Fenix fixes the battery issue and stops misleading us with the "smart mode" and false batter times, they will no doubt own the game. Until then, smartwatches don't belong in the backcountry.