Triggers very quickly start to have some weird friction to the springs, not even cleaning it with contact cleaner helped.
The mapping software is absolute trash - it's very limited and the macros don't allow the usage of the guide button, which makes them incompatible with most shortcuts on Steam and Xbox.
The controller reports itself as an Xbox One controller, the original one, which means you can't use the back buttons and capture button - you can only remap them to other already existing buttons, so L4 could be A. Which is redundant and not what someone buying a controller with back buttons expects.
The analogue sticks grind against the case.
This is all using Xinput. On Dinput the controller has issues with axis mapping.
The membrane of the main face buttons is also low quality - it feels okay, but the resistance drops very quickly after the first week of usage and it becomes too light for my taste.