Summary: I've had trackballs almost exclusively since I began computing 20(?) years ago. Started with Microtech. Eventually went with Logitech and am now using the Kensington Orbit. There is no trackball out there that is perfect. Few are even adequate. The Marble Mouse and the Orbit are both pretty good. A blending of the best features of both would come close to ideal. The Marble Mouse has good button positioning.
Summary: When I was looking for a replacement for my Trackman Wheel trackball for my laptop, I knew I wanted another trackball. Since they don't move around like a mouse, I don't need as much space to use it. As I move my latptop around and use it in smaller areas, this is very important. I was dissapointed to find that Logitech no longer made the Trackman Wheels and the cost of a replacement was prohibitively high.
Excerpt: This is probably a good product, but I had to return it. It was so large, it was hard to use and cramped my hand. If you have small hands, you might try it before buying it. Maybe I could have learned to work around it, but after days, I couldn't get used to it and had to give up. Setup was instant and it had smooth motion. Ideally, the mouse would have had a horizontal scroll too - still looking for the right mouse to use all day.
Pros: Accurate Controls, Fast Response, Smooth Movement
Excerpt: Scrolling ball has a good size. Fair number of buttons. It looses two stars because it does not have a decent way to scroll. A scroll wheel or ring would certainly take this product close to the next level.
Pros: Ergonomic Layout, Fast Response, Smooth Movement
Summary: I've been disappointed as I read that it can`t scroll. Fortunatelly, buttons could be reprogrammed. I find that I don`t use forward button (little button on the right by default) so often, and I choosed "universal scroll" instead. After beeing reprogrammed, just press it brielfy and scroll by turning trackball. One leave this function simply by pressing button again.
Summary: I'm an engineer using mu computer in the car. I have loved the Logitech trackball for years. I wonder who on earth could ever want to substitute the scroll wheel with the ball!? - And replace index finger left click with thumbs left click!!?? This is not Logic!!
Summary: For the most part this is a 5 star rated trackball but Logitech removed the 5 button combination (Large buttons pressed together) and thus removed the functionality of middle button/scroll wheel. When I bought my first track ball 10 years ago it had this function with the old MouseWare drivers. With the SetPoint drivers, it removed the 5 button. With my new computer with Win7, the old drivers are incompatible.
Summary: I bought the MarbleMouse mainly for the ball itself. I do a lot of photo and video editing, which involves a lot of clicking. I find the position of the 4 programmable buttons awkward. They are symmetrically designed; the human hand is not. Only two fingers are same length: the index and "ring" fingers. But both large buttons are the same length. And the tiny buttons at the top of the large buttons are inconveniently located.