Interesting video showing HIDIZS S8 unboxing. The same cables are included with the Tempotec OEM version. I think I prefer the Tempotec package, a metal tin with foam lining, and a thin card box. Yeah, doesn't go so well as a retail ready package to display in shops, but I'd rather have the tin and chuck 2 elastic bands around for travels. Looks to be a fingerprint magnet, which the Tempotec isn't.
OK, for me, I had problems of clicks and dropouts on Win10 1809. Once the driver was installed these problems went away. It's been fine since.
I've updated Windows 10 to 1909, didn't need to update the Tempotec driver and everything is still playing absolutely fine.
On Win7 Pro 32bit there was clicking and glitching too, but I've had this problem with a Topping D10 (although a lot less frequently) on that little Atom n2600 machine. So, not really conclusive.
Oh, and follow up on temperatures. I don't know where I pulled 25°C from. I think I just had a cold drink in my hand and it felt warm (as did the metal PC case) compared to my hand. This little DAC/amp has not gotten warm at all here. It always feels like I'm touching cold or cold-ish metal.