The thing that throws me here that others haven't commented on yet... it's built 'in partnership with TP-Link'. TP-Link makes budget hardware, that doesn't last much longer than it's one year warranty.
Charging $199 for a TP-Link device sounds... overpriced. If this had been built by ASUS, then maybe they'd have something.
> Google’s hardware partner for the initial OnHub is TP-LINK; it plans future devices with other manufacturers as well, including one from ASUS later this year.
That may be your experience, but I've been using TP-Link as my go to access points for myself and my clients (home and small business) for the past 6 or so years. I've deployed maybe 20 APs in that time and none have failed yet.
Charging $199 for a TP-Link device sounds... overpriced. If this had been built by ASUS, then maybe they'd have something.