Overall experience is that it's a pretty normal SBC just as Sopine64 or RaspberryPi, although with low-profile spec (1 GB RAM) and single core CPU, which is fine as it's a prototype board.

System slowness I've noticed initially came out to be caused by a crappy microSD sent pre-flashed by the Nezha devs. After replacing with a decent A2 microSD it started to work perfectly.