Just a word of caution: changing the Plusnet firewall settings in the user portal has the unfortunate side effect of dropping one off the trial.
Restoration to the trial needs time that the staff do not have an abundance of, so be cautious about fiddling with the functionality as did I!
This is only a facet of the trial set up.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.