I tried this for a very short time. At first the update didn’t work, until I put it on the charger. But after all update, there is a problem besides the loading time from iCloud. I used to use Microsoft One Drive to backup the photos on iPad, after the switch, most recent photos are all going to lower resolution, which is not expected, and seems that is not reversible. I am not sure how Microsoft is going to fix this link between Apple.
Problem, early this year: https://discussions.apple.com/thread/4100536?start=0&tstart=0
Three years ago: https://discussions.apple.com/thread/2615197?start=0&tstart=0
Something could be done on the server side, like this: http://www.amixa.com/blog/2012/07/03/iphone-ipad-cannot-verify-server-identity-ssl-issue-and-resolution/; but Apple is not configurable.