I’ve had the unit for almost a month and can report back that it’s been great, better performance and stable than the Tp Link and Dlink units I tried beforehand. It’s a winner. Thanks Dan. For those still researching check out this review. Most of the negatives have been resolved since that review. https://www.smallnetbuilder.com/wireless/wireless-reviews/33182-zyxel-multy-x-ac3000-tri-band-wifi-system-reviewed
It was Virgin network wide issues.
I've not had any problems myself, but always hard to know what would cause that. Could be the units, isp or some other random interference at home. I don't have a microwave so that's one thing i don't have to worry about.
After 30 days use, mine is going back. It was great for about a week! Signal keeps dropping out several times a day over the past few weeks. Although, still not sure if it is Virgin.
Interesting smoke alarm.