I've been running the SuperHub 3 for a little while now. The functionality of the UI was always sluggish but of late it has become horrendously slow. Making a simple change can take up to 10 minutes and the web page can "stall" - chrome requests that the page is reloaded - several times. Telling it to "wait" will eventually result in the change taking effect.
Furthermore I recently attempted to switch on MAC address filtering and it just doesn't work - the filtering is ignored by the router. IP address filtering works ok it seems.
It seems that other folks have had similar issues and that an engineer taking a look at things has provided some remediation. I'd like to request that someone get in touch to arrange this, as I'd very much like to rectify these issues.