Constant disconnects from the phone. Uploading a ride almost never happens automatically, you have to connect and disconnect Bluetooth, stop and restart Garmin Connect, etc. Its not the phone because an older Edge 520 Plus was rock solid with the same phone for years.

Really pleased with the 840 solar. I found the device recalculated any route changes quickly, so there was no hanging about and I was able to navigate quickly on my route after any detours. The solar recharge worked really well and I had plenty of power in the device for the whole day.

Have had it for about a month. It regularly doesn’t connect to watch, di2, powermeter if left in sleep mode after saving a ride. But that’s the default for the power button. It’s annoying to have to fully turn it off and on each time when I commute daily and the battery should last at least a week...

Great product i had some issues riding in wet conditions the touch screen would glitch a little bit but overall this is my favorite piece of equipment and i would recommend this to other riders

Had no idea how to use this and learning to use Garmin devices can be challenging. Since I don’t ride much during winter instead I use it when driving. This was you get used to the buttons, the beeps and behavior. This is working great!

I am new to Garmin GPS devices + must express my exhaustion of figuring out how to choose preference of functions….How to input trips from other navigational Apps.If Garmin chooses NOT to include an instructional flowchart of options, setup + use, at least include a hardcopy of a few YouTube info...

Decent unit, integrates well with other Garmin devices/ sensors I have, all relevant info available at your fingertips but I’ve had some issues getting ClimbPro / Courses / Profile data screens to display as desired and to disengage Segment views even when you don’t want them. Hence 4*

Works beautifully though you should watch Shane Miller’s YouTube video about setup when you first get it. You need to turn off several unwanted alerts out of the box. Great for navigation, clear screen, turn-by-turn directions, and tons of available data points.

I bought this as an upgrade from my 520 Plus. I've only used it for a few rides but I am very impressed so far. I had the 820 but didn't like it so much because of the lack of buttons. I like that this has both buttons and touch screen. (Most of my rides throughout the year require warm gloves.

Faster than 630 but start up screen a bit cluttered and some features seem to dominate. Ending a ride is not as intuitive as the 630 if you want to discard the ride. Ended up saving rides I did not want and having to delete from Strava.