I've had a Fenix 3 for 2 years, and my 5X arrived today.
Should I update the maps?
How do you set the watch up for Android Smart Lock? Do you put it in pairing mode for this?
Does the analogue watch face drain the battery faster than the digital one, like on the F3?
Anything else that might not be obvious at first?
EDIT:
(1) When you set the watch up, it will sync your max HR but not your FTP. Enter this manually before you ride.