Looking for a worthy replacement for my Microsoft Trackball Explorer I am now become finally found it. The ball of the Logitech TrackMan Wheel is in contrast to MS trackball with your thumb operated, but this I feel even more comfortable after getting a few hours. The buttons and the wheel are arranged as in a normal mouse, which makes the exchange for mouse users towards the trackball determined easily. I find the trackball really very good, the hand is completely relaxed on the device, better than on our previous trackball. Even my wife, who was for many years used the Microsoft trackball, had no difficulty with the change. I have chosen deliberately for the cable variant. Here there are no problems with the radio connection and flat batteries. Since a track ball in contrast to the mouse stands only at one point, and does not interfere with the cable. The driver for OS X Leopard operating properly and offers many setting possibilities. We can recommend the Logitech TrackMan Wheel any right-warmly. A left-handed version there is unfortunately not.