Sonoff Nspanel?

Has anyone used the Sonoff Nspannel with smartthings?

It looks slick, 2 buttons, 8 custom soft buttons. But I don’t see many using it or taking about it with smartthings so I might be missing something here.

Any similar suggestions? Other options were discussed in detail in this thread

But no similar options, hard wired wall mount, custom buttons etc.

I use the NSPanel as thermostat for an electric heater. I use Sonoff wifi plus to turn the heater on. It doesn’t into SmartThings so I use a second wifi plug before the first one so I can control the heater through SmartThings. It’s a little workaround but successful.
The physical buttons control a light and also the second plug.