Okay, I got the stick. I ordered Kai version, but the box says it is normal version. I guess this isn't big of a deal for me, because apparently Kai version has more space between buttons and the stick. I don't have that big hands, so no worries.
First impressions from a person who hasn't used stick ever. Well, it feels solid. Stick is wonderfully clicky. Buttons feel easy to press, although I'd like that they would have more tacticle feedback (I have few mechanical keyboards with Cherry switches). Travel time on them is short. Plastic on the art is glossy, so it is quite a fingerprint magnet, I wonder how easy it is to apply custom art?.
Stick was easy to get to work on PC, because it was plug and play. KOF 2002UM and KOF 98UMFE on Steam worked with no problems, it even said on the menu what controller I'm using (Hori Real Arcade). KOF XIII didn't work for some reason, I have investigate this one more. I tried it on Steam Metal Slug X and assinging buttons was easy. Freedom Planet also worked.
How did I perform? It was weird to use stick. I could to multiple quater circles in a row, without accidental dp motions, unlike with DualShock 4. Half circles felt okay. Double motions like 2 x qcf's and 2 x hcb were difficult to pull off, because apparently you have to wiggle stick damn fast. I noticed I got too much unnecessary inputs.
Well, I guess I need lot's of practice.