Upgraded my Garmin Edge after years of mostly faithful service. Liked the 820 enough I got Edge mounts for my bikes and retired the various old wired and wireless computers, preferring to switch just one among them.

But the battery was losing capacity and display (or my eyes) was dimming so I upgraded to this latest edition.

What a difference. The new 840 is fast, acquiring GPS right after switching on and responding to buttons and screen swipes in real time with none of the 820's lag. The display, slightly larger, is super sharp, contrasty and easy to read—reason enough to make the switch. Micro USB is ditched for USB C and the cover seems stouter than the one that disappeared from the 820 years ago. There is a new pair of scrolling buttons, the rest of the layout is mostly unchanged.

I have not explored its many new features and capabilities--Garmin will mimic the old unit's setup when initializing the new one, so I'm using the same screens as before, including SRAM e-shifting display. I can finally read the graphic displaying chain position of the rear cluster.

Not a review per se but perhaps some insight to anybody considering the 840, whether owning a current model or not. I had pondered the larger 1040 for its big display but now know it was not needed for readability's sake.

Note: Connect still logs two rides from the 840 and my Fenix watch, which I use for heartrate, magically doubling my miles ridden. IDK why it doesn't resolve doing two identical things simultaneously--maybe there's a setting I haven't discovered.