It's for use with a controller like they are used for consoles - joypads or gamepads or whatever you wish to call them. I find having a gamepad quite valueable while AoEing on my Bounty Hunter, as it offers a quick way to target dead mobs.
You will need one with at least as many buttons/axises as a PS2 pad though, it seems, if you want to avoid the spinning. It's been buggy since C4, and I don't think enough people use it for them to care enough to fix.