I've had the 5x since Friday. Not my first dance with Garmin devices, including the F3 sapphire I've owned since it was released. My experience with the 5X has been frustrating to say the least. Most issues seem to be centered about a broken sync between setting on device, GC mobile, GC, and Garmin Express. Issues include:
1. Setting alarm on watch (6am every day, for example) will be immediately turned to "off" once watch syncs with phone.
2. Set manual resting HR on watch in never saved (even without sync to phone). One you set the value and leave the menu, going back in it returns to "=".
3. Notification sound/vibrate set to one (individually or together) - immediately turned "off" after sync with phone.
4. All notifications stop showing up on watch (despite phone still connected in both phone BT settings and GC mobile app). Didn't happen until I awoke this morning. I assume rebooting the watch with temporarily reset...
5. Watch Face light set to gesture - just stopped working this morning, then several hours later began working again. I verified watch was NOT in DND and it was also outside of the "regular" sleeping hours set on the watch.
6. After a sync with G Express...option to "eject" watch is grayed out in GE. Can only eject from Finder.
7. If synced with GE, then disconnect and sync with GCM, when reconnected to computer GE no longer sees the device, and also the device doesn't mount in "Finder". Requires rebooting of the watch.
8. Unable to get Basecamp to see the watch.
9. Unrelated issue --- Ant+ connection to Kickr : frequent drops of PM (while maintained connection to Edge 820) despite watch on stand 3 feet from trainer. Doubtful this will maintain stable connection to the Vectors on outdoor ride...just haven't tested yet, too busy trying to get watch to work:-)
10. Frequent spinning "update" notification on watch when navigating through various widgets, and after spinning update notice finishes, display reverts to watchface from whichever menu I was in.
So for $900 (metal band), is this really what I should expect? I have spent HOURS trying to get this device into some form of a reliable and stable working state, to no avail. I think my time is a bit more valuable then being a beta tester for Garmin.
I'm about to give it one more try...will "Remove" device from GC, GE, and GCM. Delete GCM app from phone. Forget device from phone BT. Factory restore device settings (Bye Bye custom watch settings), and start from scratch. Beyond that, I'm returning to the F3.
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F5X, F3 Sapphire, Vivoactive HR, Vivofit2, Forerunner 630, Vivoactive (1)
Edge 520, Edge 820, Vector 2, Varia Radar
HRM Swim, HRM Run, HRM, G Footpod,
MBP 2016, Iphone 6, all OS up to date.