Plastic is high quality and does not crick and crack when the controller twisted, very solid.
Buttons have the right balance between clicky and mushy, very similar to modern controllers.
Rubber domes have excellent quality, really well done.
Buttons do not rattle, except the x,y,z buttons which are slightly looser.
PCB is very high quality as expected from Krizz.
The 2.4GHz wireless connection is rock solid and instantaneous, unlike bluetooth that takes time to sync.
Here are the shortcomings in my mind that hopefully fixed in the next revision:
The D-Pad is slanted only on the controller mold but NOT on the PCB, I think something went wrong with the controller or D-Pad mold.
I do not actually notice that it is slanted during gameplay, only when I look at it, so not big issue.
EDIT: The D-Pad shaft is slightly twisted in relation to the arrows, this is definitely a defect.
Not only the controller d-pad mold is slightly angles (by design) but the d-pad shaft too, combined result in a too much twist of the d-pad.
For 65$ I expect krikzz to fix this ASAP.
It passes the Street Fighter II moves execution test with flying colors.
It is the best Sega 6 button controller in my collection as of now.
Overall feels great and plays great, definitely recommended (after krikzz fixes the d-pad).
85/100 for d-pad defect.