Originally Posted by Foss
I am playing with a M&K aswell and haven't encountered any specific problems with it.
Only issue for me is that it seems like you still use the ingame options for mouse rotation speed and mine is at max. So, not the fastest rotation speed imo.
The mousefix also lets you bind keys to your mouse buttons. I use the standard which is:
Left button: Normal attack
Right button: strong attack
Middle button: Target lockon
4th mouse button: Block
5th Button: Parry
Edit: Forgot one thing, the UI in the game still lists the xbox controller buttons. So you need to either check the keybinding page or figure out on your own what buttons does what.