The quality is questionable with dozens of variants of the same product from different sources.
There are clones, but I thought KSGER means a very specific t12 controller that is sold from an official aliexpress shop. I'd suggest buy from there, do not buy clone of a clone
Concerning safety, I wouldn't trust it, it's up to the buyer to check isolation and grounding :/ Ofc, no certs/compliance either.
It seems unreasonable to expect real companies such as Hakko & Pace to compete price-wise with goods from Bangood and Aliexpress.
I still think there is a lot of room to make branded products more accessible. Plus, for some reason, for example, ads200 costs ~%50 more in Europe than in US. While KSGER has same price everywhere. Not to say there are no artificial limitations which many big vendors like to put to segment the market and make maximum profit. This used to work, but... I'd say the market landscape is changing, will see what's going to happen next.
BTW, is there really that big demand for certified hand-soldering stations? Who buys them (except mil/gov)? I doubt a typical repair shop would care about certs.