Yes - I could clearly download, install, and play around a lot, but I think documentation for plugins like this would be greatly improved if they explained more up front about how they work in MultiSite.
Does each SITE have its own options?
Does each USER set their own options?
Does a Network Admin set it for every user/site on the network?
Great idea for a plugin. We do very similar stuff in an mu-plugin on our installations, but it's all hardcoded instead of this UI.