Yes, it works!
We've received a lot of requests related WordPress Admin use-case. And we've created a UserGuiding WordPress plugin to make it work!
You can take a look at the following article & video to learn how to implement UserGuiding on WP back-end.
Here is our plugin: http://bit.ly/ug-wp-admin
Implementation article: https://help.userguiding.com/account/domains/how-do-i-install-the-code-snippet-on-wordpress