I also have a Nokia 7+ since yesterday (Belgium) and i was surprised it didn't update to Android 8.1 and the March security update. I thought with Android One it gets theses updates automatically.
Yes it is a very good phone. I have the 7+ for 10 days now and i am truly happy.
Fingerprint scanner works quickly, so does charging. Photos are great (i even installed the Google Camera app to check if there is a difference, but i don't see it.
Battery life is long, although for me it doesn't last 2 days as mentioned.
Only negative point is that is does not have a notification led :-(
Now Android 8.1 + latest security patch and i am very very happy :-D
Just a few minutes ago i received the upgrade to Oreo 8.1 (V2.13B) & update Google Security Patch 2018-04.
Size is 590.2MB
(I live in Belgium)
I noticed that in the Gestures settings there are more options now:
Turn Over to reject call
Mute on pickup
Swipe fingerprint for notifications
Jump to Camera
Lift to check phone
Hong Kong got 8.1 update on 12/4/2018