Hi all,
As promised, here's a quick review (in bullet points) of my experience since I upgraded to 1896:
* I'm still occasionally having to put my 4 digit code in twice when I get in the car after my wife has been logged in.
* I haven't had any errors with speed sign recognition, cruise control or active drive assist.
* My map display won't show up in the driver console, but that would just have been a bonus so it's not a problem.
* The headlights still come on, as per my settings, when I approach with keys in my pocket.
* Temperature sync still has to be set on each journey.
* Voice command stopped working for a few days until a second smaller OTA update was carried out, but all fine now.
* Someone else mentioned a faster gearbox response in comfort mode, but I haven't noticed it.
* All user logins and settings were retained, so I didn't have to go through the rigmarole of setting the car up again.
In summary - all good and recommended.