Summary: My apologies to those folk who really like this unit, but there were just too many things that didn't work for me. The SlimBlade Trackball's buttons are placed under the four plastic flaps. You press the flap and it presses the button. The actual buttons are positioned directly on either side of the ball.
Summary: I love or is it now loved Kensington products. I love my old Kensington trackball. Had it for ten years. When I saw this slimblade I preordered it right away. Figured I would treat myself to a new toy. I liked the idea of the ball being a bit smaller and smoother. Boy I should have waited. What is the point of having two extra buttons if you can't program them? I hate it when a "smart" company takes a great product and moves it back a step.
Summary: And so it sits next to my computer, hopefully waiting for software that will make it work. WHY didn't I listen to other reviewers. I wanted it for the more ergonomic profile, which it has. But it Doesn't work, it's not controllable at ALL, a sheer failure for Kensington. And I've bee using their products since the late 80s. This is the biggest waste of money I've spent this year!
Summary: I'm going to have to side with most of the other reviewers. The hardware design on the trackball is fine, but the software shortcomings outweigh any hardware advantages. I'm a long time mouse user (love the Logitech MX Revolution) and switched to the Logitech Trackman Wheel at work to save my wrist and desk space. I didn't like the lack of control I had with my thumb, so I thought I'd give the new Slimblade a try.