I think its pretty neat! I’m still trying to get used to it. The mouse cursor movement is a bit too fast for my taste, but that can be probably customized in the firmware. The concept of teleporting the cursor to different quadrants of the screen is even better (albeit stranger). My main gripe is that it doesnt support multiple monitor setups, but that too can be most likely fixed one way or another.
Depending on what I’ll end up liking more, I might end up removing the other mouse control keys to free them up for some other unrelated custom key stuff. The FN layer is pretty crowded as is.
Edit: I wonder what captchas operating on mouse movement will have to say about this.