Rating: 
Summary: Not Good! My Hand goes to sleep!
Review: I have trackballs on every computer in the house. They aren't optical like this one, but I wish they were. No more cleaning!But I can't for the life of me operate this one like the others. I am used to the index finger moving the ball and the thumb doing the clicking, so I am constantly fighting this thing! Plus my thumb doesn't have the range of motion that my finger does, so it isn't as easy or as quick to move as the other kind! The part that really gets me though, is that my little finger and ring finger goes to sleep and then I get pins and needles! Maybe you can get used to it, but I won't! Will be replacing this thing ASAP.
Rating: 
Summary: Simply the best trackball ever made
Review: I have used a Logitech Trackman Marble (this product's predecessor) since it was released in 1995. I still use that original one at home. (When was the last time you used a computer product for eight years?) I enough that I can feel the difference between the muscles on my right thumb verus my left. I love it so much I have gone so far as use my soldering iron to replace the worn-out button switches. (They happen to use the exact same switch as the ubiquitous MS mice.) This device fits my hand like a glove, and saves desk space since it never needs to move. The lack of rollers isn't such a big plus since the advent of optical mice, but it is still nice. While this is a stupendous product, you should never buy a pointing device or keyboard for the first time via mail-order. The only way you will know if it fits your hand is to go to a physical store and try it out. It may fit my hand like a glove, but it may not fit yours.
Rating:
Summary: My favorite mouse/trackball
Review: I love this trackball! The ball motion is smooth and quick. It is great for gaming. The motion is not as precise for making tiny movements as a non-optical mouse/ball, so it's not as good for graphics or CAD. But I'll gladly deal with that for the increased comfort it provides.
I used the older Trackman (the white one) also. I like the new silver one better because the ball almost never needs cleaning and it fits my hand and my wife's hand better. There's a hole in the bottom for dust to fall out, and to help remove the ball for rare cleanings.
Rating: 
Summary: Works fine with my Mac
Review: I purchased this to replace the mouse that came with my Mac G4, since that mouse was constantly getting stuck and I needed something that was more comfortable for my hand and wrist. The first day I used this, I wasn't too sure about the thumb trackball. My wrist was a bit sore using it. However, by day four, I'm sailing along and will NOT go back to my Apple Pro mouse. My wrist isn't sore at all from using it, and the trackball is incredibly smooth. This just zips along the screen and I have no accuracy problems. I still use my wrist rest with the Trackman, but don't need a separate mouse pad. For someone with carpal tunnel, I think this is a vast improvement. For Mac users: If you're using Mac OS 8.6 - 9.2, software is included that allows you to program the mouse buttons to complete specific functions. The software is still being developed for OS X and Logitech says on their site that it will be available for download there soon. However, if you're not planning to program your buttons, it doesn't matter. The Trackman is plug-and-play in your USB port and works just fine (I'm on OS 10.1.5 and have been using it with no problems at all.) I'll download the software when they have it available for OS X, but am more than happy in the meantime since I have no plans to program the buttons, etc.
Rating:
Summary: Not as good as its predecessor
Review: I purchased this trackball to finally replace my aging Logitech Trackman Marble with a newer one. I have a Trackman Marble+ (with a scroll wheel) at work, and I love it. The one I have at home does not have a scroll wheel, so I thought it was finally time to upgrade. Unfortunately, this next generation of Logitech's ingenious thumb-operated trackball does not live up to the promise of its predecessor. They have made it both taller and narrower, neither of which are positive changes for people with anything but the smallest hands. And in an effort to keep up with the foolish decisions coming from Microsoft, they chose to provide translucent windows around the ball itself, allowing the red laser light to escape and light up the entire room. Overall, I cannot recommend this device. I do however strongly recommend the earlier rendition, if you can find one.
Rating:
Summary: I only buy logitech
Review: I still use a logitech mouse I bought, hm, I'd say about 8 years ago, and I just bought this new trackan to replace a 5 year old one. It was still working as well as the day I bought it until it was involved in an accident involving a long drop to the floor, and then an encounter with the full weight of my body. Everything still worked fine though, but the right click button sometimes needed to be pressed more than once for a response.
The new mouse is a bit more futuristic than I like, I really hate the new silver color they're making everything these days... But the product is still the same great trackball. I can't stand mice anymore. And for you people out there who think it's so weird... Give it a day. The rest your hand gets from not having to move that damned mouse all around is fabulous.
Rating:
Summary: Logitech Trackball
Review: I think this mouse is a very good mouse, it fits my hand perfectly, and it's very comfortable, never hurts my thumb.
Rating:
Summary: TrackBall
Review: I use architctural drafting programs in a very small office, and my wrists began to ache with all the shifting and moving i had to do with a regular mouse. I decded for the TrackBall, and am very pleased with it. I have small hands but the shape contours very nicely, and the ball rolls very smoothly. It is reat since i do not have to flail around anymore to get from one point to another on my drafts, and also I no longer have contend with a mouse-ball that stalls, gets stuck, or randomly moves.
Rating:
Summary: I looooooooove my trackman :)
Review: I used to have a lot of wrist and shoulder pain with a regular mouse, but the trackman has changed all that for me. I can use the trackman while it is on my lap and on a variety of surfaces. My only difficulty is that visitors have a very hard time using it--it takes 2 or 3 days to really get the feel of it.
Rating:
Summary: I want my old style Logitech Marble Wheel
Review: I went looking to buy another one of my old style white Trackman Marble Plus type of 2 button trackballs with roller like my 804335-000, the style of which is a few years old. What I found was that they now only sell the gray slightly smaller Trackman Wheel Optical #904353-0403 (and 804360-1000), and I dont like the design. The buttons are too close together, and the buttons are too close to the ball. The roller itself is also too close to the ball, and so the middle finger cannot easily manipulate the roller without arching the finger considerably more than with the older style. The buttons of the old design were a fingers width apart each, but on the new design, the buttons are less than a fingers width apart. It seems Logitech designed the new trackman to be used with 2 fingers instead of 3 fingers, even though they count the roller as a 3rd button.
The older trackball device overall was wider/longer and fit my hand better, the new trackball device seems to be made for small people, perhaps non-adults. The height of the old device was low and allowed the hand to not slip off easily, where as the new trackball has a steeper slope to its sides, and it takes more effort to keep ones hand on top. I actually fear I will succumb to carpal tunnel syndrome if I continue to use the new product. I agree with the other review that posted similar to mine, I love the old style, it was the best design out there. I would not buy the new style, I would tell others to try to find the older wider/longer white with red roller Trackman Marble Wheel or Trackman Marble Plus design for sale somewhere.
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