Had it for under 2 weeks --
1. 4 times I've had to reset it
2. It disconnects from my Varia Radar EVERY ride
3. Most rides the cadence and power sensors go blank for a portion of the ride
4. Light network NEVER forms
5. Keep getting Download Failed messages every time I switch it on
6. iPhone app has only ever worked the first time when I used it to set up the device. After that, I keep getting the device is busy sync error
7. Uploads over wifi fail most of the time. Have to hit Upload Ride at least 3 or 4 times after every ride
8. Resetting it for the 5th time today
Called the store I bought this from and the guy had the Garmin support number memorised - clearly this is a big issue and he rattled off the phone number within 30 seconds of me talking to him about these issues. Refused to accept a return and said it's a general Garmin problem and that Garmin should be responsible.
So much for a $1000/- bike computer. Upgraded from a Wahoo Element Bolt which was FLAWLESS! Everyone told me not to go Garmin...sigh