Good. It barely worked the few weeks I tried using it, and I eventually uninstalled it myself because it is not compatible with some of the new security modes a corporate MFA can be configured to.
In particular the (new?) manually-type-in-the-digits-shown-on-your-screen mode which, on the proper iOS app, shows location of the sign-in as well as a field for inputting numbers below. Those prompts just had the watchOS companion app direct me to the iOS app since it couldn’t handle them.
But even for regular verifications the companion app sometimes didn’t work for me, and so I ended up just uninstalling it myself a few days ago.
I am a new watch user so I am still trying to figure out a good balance between the watch and the phone as I don’t want the watch to replace /all/ notifications etc.