Working very well. This add-on give the users the option to disable the censor system. The censor is enabled by default for visitors (and users).
No problems with payment, download and installation. No bugs registered in my live community. I can recommend this resource.
Despite the potential of this extension that could actually enhance the security of users on Xenforo, the developers behind this extension are absolutely not listening to these customers and drag to update the extension after sending more than 20 emails about problems of use with YubiKey or double authentication by SMS, the two important features to the extension does not work badly or not at all. The extension has potential but not the team that maintains it.
Must be incompatible with X2.1 ... broke my installation with a laundry list of Server Errors ("ErrorException: Template error: Template public:XenStickyKonu is unknown") -- quickly uninstalled. Also, this doesn't seem to work on a thread-level, meaning you cant show a different notice per a different thread-id. That was my understanding of it. Gave 3 stars (vs 1) because the dev offered this for free and that in itself, deserves thanks.