We use them periodically for different things. The one sticking point we've run into is that for some reason, those specific emails get routed to Junk Mail a LOT by Outlook, even when all the ordinary notifications coming from the same email arrive just fine. I finally put together this single slide on how to add the WF email to your allow-list in Outlook.
I believe 'Everyone' is truly everyone, so I'm careful to select only the Groups/Teams etc that I want to receive the message.