Tried, the 6KRO works on these combination :
asd jkl, qwe iop,awd jil, awd ko; and more which i dont feel like trying all the possible combination

zxc doesnt works though, maybe kbc define 6KRO by the means of any random 6 keys, so it failed the test possibly due to the one i've mentioned.
*For some reason my bluetooth failed my photo transfer

will upload those later on after i found my cable.
Here is what a think, the one i got is a black switch, so it's not noisy. The POM keycaps are quite tight, the seller told me not to switch the caps too early as there are several cases of users pulling out their switch along with the cap itself. I dont see a problem with it, just pull it carefully and you'll be safe. They have included a 1 year warranty card and a usb to ps/2 converter in the box. One thing i found out pretty strange is the winkey lock LED and the breathing light located under the spacebar, you can hardly see it under bright environment

They claimed that the input refresh rate is as low as 7.92 ms, who knows?