Ground/PE pin is there, in passthrough mode at least (I'm using European/Schuko version). CE certification is obviously missing (in Conformité Européenne sense I mean, China Export is there), but hardware is 1:1 clone of Sonoff, so I don't worry too much about safety. The device looks like a mass produced in a factory, not a homemade solder in a garage. Temperature isn't hot, looks normal to me. ESP8266 chip is the same, the rest (a few Y caps, resistors, LEDs, pushbutton etc) I'm pretty sure is chinese crap anyway, regardless of whether this is Ewelink or genuine Sonoff. Local suppliers here in Ukraine are selling Ewelinks reflashed to Sonoff firmware as genuine Sonoffs anyway, so I see no point in spending more.