Provided that the workarounds mentioned in this page are applied: everything, from installing the launcher to logging in (maybe with another workaround, see below) to installing and launching games through it.
What does not
After launching with the Wine default configuration, the connection to the Uplay servers may stall at "initialization". At least, it does for me. Hence the "Gold" rating instead of "Platinum" (see the workaround below).
After configuring Wine to run "upc.exe" as a Windows Vista exe (and letting everything else run as default Windows 7), I can connect to the Uplay servers flawlessly. Workaround inspired by the comments to the Bug 41652.
What was not tested
Buying through the store
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Show||Arch Linux x86_64||Feb 07 2019||4.1||Yes||Yes||No||Platinum||Ozan|
|Show||Fedora 29 x86_64||Feb 01 2019||4.0||Yes||No||Yes||Garbage||oliver z.|
|Current||Linux Mint 19.0 Tara||Nov 30 2018||3.21-staging||Yes||Yes||Yes||Gold||Benoît Smith|
|Show||Debian GNU/Linux Unstable "Sid" x86_64||Oct 19 2018||3.18||Yes||Yes||Yes||Silver||Vladimir Bespalov|
|Show||Arch Linux x86_64||Oct 14 2018||3.18||Yes||Yes||No||Silver||Peter Schmidt|
install corefonts via winetricks - otherwise login screen would not show
Wine versions before 4.7 failed on Fedora; Please use the latest winehq version
optionally install winbind or similar package that provides ntlm-auth to eliminate some warnings during startup
sudo apt-get install winbind # for ubuntu/debian