When comparing Razer Ouroboros vs Kensington Expert Mouse, the Slant community recommends Kensington Expert Mouse for most people. In the question“What is the best gaming mouse?” Kensington Expert Mouse is ranked 55th while Razer Ouroboros is ranked 67th. The most important reason people chose Kensington Expert Mouse is:
With thumb and pinky on the buttons and three fingers controlling the ball, the user's wrist lays flat on the table (or on the provided attachable wrist rest).
Specs
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Pros
Pro Hybrid wireless/wired mouse
The Razer Ouroboros is a dual wired/wireless mouse so that when the device may be running low on battery the user can just plug it in.
Pro Swappable side magnetic panels
There are swappable magnetic side panels comprised of two thumb grip and two finger rest panels. This allows for users to customize the size and shape to their liking.
Pro Rechargeable (and removable) AA battery
There is an included rechargeable AA battery that offers 12 hours of gaming time. It can also be swapped with another battery if needed.
Pro Ambidextrous
The Razer Ouroboros is and ambidextrous device so left or right handers can use it equally.
Pro Comfortable and ergonomic
With thumb and pinky on the buttons and three fingers controlling the ball, the user's wrist lays flat on the table (or on the provided attachable wrist rest).
Pro Intuitive link between ball motion and FPS camera angle
The ball is large enough for turning it to feel like physically rotating an object.
Cons
Con Expensive
At $149.99 this is a pretty expensive device, even if it is wireless.
Con Not a mouse
This is a trackball, not a mouse.
Con Questionable secondary button defaults
The upper left button, which is the hardest to use, is middle click by default. The upper right, which the ring finger naturally rests near, defaults to Back. This can be particularly annoying as the Back button is easy to brush when moving hands between keyboard and mouse.