Yeah, the 25th Edition was sold out pretty much instantly in the U.S. and U.K.... luckily, they had some left here in Canada when I placed my order. There were only 20,000 issued and apparently they aren't going to be shipping anymore, which surprised me.
The only niggly problems I've seen so far with the game are that you can't rename cities (although the Firaxis Dev has committed to fixing that) and the scrolling apparently doesn't work as well as in Civ 5.
BTW, if you want to stop the Auto Unit Cycling, I have a fix for that below...
Go to [drive+user]\Documents\my games\Sid Meier's Civilization VI
The file you need to edit is called UserOptions.txt
The line you are looking for is this one:
;Does the selection auto cycle to the next available unit? (0 = no, 1 = yes)