It posts a slack message to a channel, which triggers an alert on my desktop. My build/test/deploy cycle (for the GAE app, which is the primary service) is currently about 25 minutes. I'm happy with the flow.
My only real complaint is that Github Actions offers almost nothing if a build fails. I try to put some useful info in the slack message, but often I have to download and grep the build logs.
Yeah, that's the difference between Heroku and all these "alternatives" people tend to recommend. They are not the same.
Heroku you push your code to git and if the push succeeded, the deploy is done. If the deploy fails, so does the git push.
If you have failing deploys in your case, you'll end up in a state where what's deployed is not the same as what's on the git branch. Personally, I avoid that like the plague.
My only real complaint is that Github Actions offers almost nothing if a build fails. I try to put some useful info in the slack message, but often I have to download and grep the build logs.