Sounded like a useful thing, loaded it up, and all I'm getting is "you do not have sufficient permission to access this page." I'm the admin, if I don't have enough permission, who does? I've been through the plugin's code to see where it's squeezing so tight that even admins aren't considered admins, but no amount of tweaking seems to be fixing it.
Really disappointing, since the only other option I can find (site_unavailable) renders the front-end closed off, and that doesn't do me any good if I'm testing a plugin that has front-end impact. I could really use this plugin, if it would just LET me!