The idea, according to the simple, multilingual marketing spiel on the front of the Orbit Trackball box, is 'comfort meeting control'.
Having only ever used a trackball in abortive attempts to enjoy the odd Missile Command cabinet, I wasn't entirely sure what to expect, but I've actually been pleasantly surprised.
Now I'm not about to ditch my wireless li'l Sidewinder for this glossy-balled pretender, but I was far more comfortable using the Orbit than I expected. It's responsive and the optical sensors are set at a high enough dpi rating that even on a 1,920 x 1,080 desktop I wasn't hammering the ball just to get across the other side of the screen.
It is actually comfortable to use as well, so long as you ditch the rubber codpiece-looking, wrist-rest.
Once the expected mouse-related RSI really takes hold I'll switch to the trackball, but I don't expect the trackball's wrist-rest to offer up yet another strain…
The button placement and scrollwheel encompassing the ball itself though are all neat, responsive and functional; in fact the only real problem I had came down to the really fine movements.
Despite the fact the sensors are indeed optical they still rely on the smooth movement of the ball itself; and if that ball ain't shiny as Darth Vader's dome, hitting a small target with the mouse pointer is a devilish exercise in frustration.
Still there's always the age-old problem for us gamers; you're always going to have to switch back to a mouse for any twitch-based gaming. That said I did manage a five kill streak in a MW2 Hardcore Team Deathmatch…
Follow TechRadar Reviews on Twitter: http://twitter.com/techradarreview