Performance-wise and functionally, the
FPS Freek Havoc works just the same as the
FPS Freek - or, perhaps, like the more recently released
FPS CQC: it features a concave thumb surface and adds a bit of height to give you better accuracy and precision when playing.
Like all of the KontrolFreeks I've tried so far, they fit snugly on the Analog Sticks of the OEM PS3 and Xbox 360 controllers, so you can play as rough as you normally would without fear of them popping off of your Xbox 360 or PS3 OEM controller.
Unlike the CQC, however, the FPS Freek Havoc is a normal height extension, in that regard being much like the original FPS Freek, adding a full half-inch to the stick height.
The FPS Freek Havoc features a concave thumb surface, cupped so that your finger can rest in it and the laser-etched rubber thumb surface provides even enough grip for when the competition has you sweating bullets.
The black-on-black color scheme helps the Havocs blend in to your existing controller, remaining understated, while the skull-in-the-cross-hairs says... well, I think everyone gets that message loud and clear.