Got 1040 (not solar version) to upgrade from 830. Transferred profiles, sensors, phone, history, etc. no problem. Di2, Powerlink pedals, Dual HRM, S8 Phone. Not using any Connect IQ stuff.
Have three rides so far. No sensor disconnects (that I'm aware of). Navigated a course using Power Guide (I like this feature) without any problems. LiveTrack, text messages, and calls all work as expected. Stamina page is a useful tool. GPS data looks more accurate when analyzing it on the map.
Editing screens from phone works well.
While navigating it seems a little slow to complete the turn and revert the screen back from the pop-up window.
Bigger fonts (I'm in my mid 50s) would be helpful. Minimum font size would be great!
While saving locations and choosing a symbol, it's impossible to determine what they are. Way too small. Maybe add a descriptive name too.
I'm very happy with the unit so far.