I use the Shelly 1 PM to control and measure energy in some outlets here. Although wi-fi, they're extremely stable and works like a charm with Hubitat. They're very accurate, and were the only reliable option to automate my washing machine I found.
Sounds like no one's tested the ones I linked with Hubitat, but I looked more into those ones and I'm not much into those, either. When you look at the specs/data sheet, the surround is interchangeable but it's not like a standard outlet, and the back of it will only accept one cable by the looks of it.
I guess it's slim pickings out there right now but I don't really understand why. Surely lots of people want built-in zigbee outlets
Its hard to say really, my mesh is quite heavily populated with repeating devices, on top of which most devices seem to go direct to the hub. So, while I can say they do seem to repeat just fine, and several have routes through them, I can't really say whether they are better/worse/same as the GE/Jascos or Samsungs I have.