Logitech Trackman Marble

Good – A lot trackball out there are not anthroprometricly correct. The ball should be used with the index finger as it is more dexterous and the button should be used with the thumb as it is stronger. But this trackball satisfy both issue. The ball is nice and big for fast and accurate operations. It is skinny and compact so will fit in most places where a mouse is not feasible. Small and accurate. Good rubber feet for grip. Looks cute. Ergonomic in operations. No scroll wheel. No middle mouse button (but can be programmed). Dust gets under the ball and obstructs the optical reader so will require cleaning maintenance every 4-6 months or so.