The mouse movement flat-out doesn't work. And to make it worse, if I use a mouse with any buttons on it other than the standard 2+wheel, it mixes up the axes and treats X-axis mouse movement as pressing the "Y" button. So I had to find a crappy mouse, gaming mice didn't work (tried G500s, G500, G5, Mx518) and it still doesn't work worth a damn. There's a significant lag from the time I move the mouse to the time it actually aims on the screen. It's useless. Worse than useless.