I’ve had a wiser single channel wifi hub and room stat for a few years now, recently had an offline moment, probably from powering my wifi down many months ago, getting colder now and no heating. Manual heat button works and fantastic response from wiser helpdesk, usually next day, but very good clear and workable instructions, I’ve found the whole concept is perfect, remote control of heating on phone or tablet and more importantly supports ‘Open Therm’ don’t let anyone install anything that doesn’t support OT, why has the whole industry been forced to add a modulating gas valve when some controllers can’t make it modulate !!, wiser does and it removes the ‘on-off’ effect of switching types and saves gas, great system and great support.