Excerpt: It's a little too long for your hand, and it has a couple more buttons than it needs for your average mouse alternative. I keep having to adjust its position on my desk, but it's still better than the frustrations of a mouse. The roller action is smooth. The roller ball isn't a separate piece, and is also raised high enough from the surface of your desk/table/whatever to keep the foreign particle contamination down.
Excerpt: Since I have owned a PC I have used a Logitech TrackMan® Marble Mouse the first one I bought had tiny metal balls instead of the plastic one's they now use. I dont like the plastic at ALL they are not as smooth they dont last as long.
Excerpt: We currently have the Logitech trackball with the ball under the right thumb. Bought this because one of us is a lefty. Neither of us could guide the mouse with any precision and then the click would move the mouse causing wrong selections.
Summary: This is my first trackball mouse and I'm never going back. It takes up less space and is more responsive than any other mouse I've ever used. It took a few days to get used to the quick action and the location of the scrolling buttons other than that I have had no issues with the mouse and I would definitely recommend it to a friend.
Summary: im in the market for a new trackball. ive used a Logitech Marble Mouse Trackball for about 3 years. one of the buttons has become weak and falters. i hold it down, dragging the things onscreen, and the button flickers off, dropping what im dragging. is the life of a mouse 3 years? can't we shoot for 10?
Summary: Bought it from a local store. The optical mouse somehow changes my CTX 19" (brand new!) monitor different colors. I don't know much about hardware (and don't care to learn since ecommerce security is my field), but don't waste your money. Buy another brand.
Summary: This Logitech trackball is pretty good--durable, sensitive, with sensible button placement. That said, its ergonomic design isn't for everyone; my large, stubby hand and fingers aren't ever quite at rest with it. (Could it be that that's the secret of ergonomy?) I hated it at first, but have grown used to keeping my wrist muscles slightly tensed.
Summary: There aren't many left-handed or ambidextrous ergonomic mouse controls out there, and this one does an adequate job of providing basic functionality. But it could be a lot better. The ability to customise buttons via Logitech's software is limited, and doesn't even work in every application. The marble mouse only has four buttons, and they aren't context sensitive - to the extent they work, they do the same thing in every application.