I am playing with an x-box one controller, and despite some bugs, I'm enjoying myself. Some tips:

- Don't calibrate, it skips the bottom-right corner and you get constant drift and have to reset the joystick settings in the options.cfg to this to get it back to stable:

joystick = 0 0 0 65535 65535 33028 33028

- There are some bugs with the remapping of keys, and most axes are not supported, so for example you can't map accelerate/decelerate to the LT/RT triggers. You can use a keymaper to map keyboard commands to the controller, but to be honest you're better off flying with the controller and issuing commands with the keyboard. All you need on the controller is flight controls and weapons. If you can assign targeting there to your preference, you'll have everyhing you need minus roll & throttle.