Rating: 
Summary: My favorite pointing device.
Review: I have worked with a lot of different pointings devices, both mice and trackballs, and this is my favorite. If placed correctly, all pointing operations can be preformed with just the middle and ring fingers, leaving the rest of your hand stationary. By "flinging" the marble, you can move the pointer large distances with ease. In addition, because of the large size of the marble, you can easily make fine-grain adjustments.I love this pointer so much, I have bought the unhappy Seattle reviewer a normal mouse in exchange for his TrackMan. :)
Rating:
Summary: Puts the mouse where it belongs THE TRASH!
Review: I just started using my new Trackman Marble FX, and I gotta tell you GET ONE! This thing is so smooth, so precise I wish I had one months ago, I have never used any pointing device that works as well as this one, and believe me I have used about every version of a mouse there is, nothing comes close to this trackball! If you're in the market for a new mouse forget about it! Try a trackball you will not be disappointed.
Rating:
Summary: Wish Logitech still made this trackball
Review: I love this mouse. I was getting cramps in my hands from using regular wheel mice and different kind of trackball. I got this trackball through work a little over two years. It took a while to get used to, but now I don't any problems with my hands. I saw some people wanted a left-handed version of this trackball but I haven't ever thought it about. Yet I should be one of the people to want left-handed versions of mice, I am left-handed. I have always used a mouse with my right-handed since I started working with CAD (computer-aided-drawing) programs 10+ years ago. I got so comfortable with the trackball at work that I brought one for home. I am glad I bought when I did (early 2000) since Logitech doesn't make the corded version anymore. I haven't tried the cordless one yet, but it looked like it would be a little uncomfortable with such a quick and high angle of rise for the hand at the back of the mouse (part of reason why I didn't like the other kind of trackball). I love using this trackball so much that I actually asked the company that brought it for me orginally if I could take it with me (or buy it from them) when I left the company for a another job. Just my luck a month later they laid me off and the only bright spot about the lay-off was the company let me take the trackball with me. I will never go back to a regular mouse again even everyone avoids my computer just so they don't have to use a trackball that's unfamilar to them.
Rating:
Summary: Superb trackball
Review: I shopped and tried several types and brands of trackball mice.... This one is it. The larger trackball makes it a breeze to operate with any free finger. I can play games for hours with no aching elbow or wrist. It was necessary to download the newest drivers after upgrading my win98, but that was simple enough.
Rating: 
Summary: Better than a mouse
Review: I was aprehensive a first but now I'll never go back to a mouse. Four assignable buttons make this a dream to use, especially when surffing the web. And those of you addicted to the scroll wheel will love the ability to not only scroll up and down but left and right using the ball. Using this product has actually reduced the effects of carple tunnel syndrome for me. Because I can put my wrist at an angle (wrist straight but rotated about 20 degrees clockwise) it feels more natural and reduces twist at the elbow. Also, since you don't have to move it, it uses less desk space. I don't like using it when playing fast paced shooting games. The track ball motion isn't a natural movement when pointing in a hurry. I would also like to see a left handed model.
Rating:
Summary: USB Version Needed
Review: I wish Logitech would produce a USB version of this trackball. This trackball is the best pointing device I've ever found. I have to clean it maybe once a year and it only takes about ten seconds. It is extremely ergonomic. The ball moves very smoothly with your index and pointing finger. I prefer a less-sensitive motion so the ability to use two fingers vice one thumb allows for fast controlled movement when desired. You don't have to "climb" the case to get at the ball and you don't have to break your wrist angle either.
After seeing the new trackballs out there I wonder if the new trackball designers have ever used one.
Rating:
Summary: USB Version Needed
Review: I wish Logitech would produce a USB version of this trackball. This trackball is the best pointing device I've ever found. I have to clean it maybe once a year and it only takes about ten seconds. It is extremely ergonomic. The ball moves very smoothly with your index and pointing finger. I prefer a less-sensitive motion so the ability to use two fingers vice one thumb allows for fast controlled movement when desired. You don't have to "climb" the case to get at the ball and you don't have to break your wrist angle either.
After seeing the new trackballs out there I wonder if the new trackball designers have ever used one.
Rating:
Summary: Wicked accuracy. Intuitive buttons.
Review: I work in a helpdesk environment which means I have to constantly "Mouse around" a great deal. The old HP OEM mouse was gunked up and I wanted something that did more than two buttons. This puppy has it all. The software was well written and intuitive, and the fit of the trackball unit to my hand fits perfectly. The additional functionality of four buttons takes a bit to remember, but after that - your efficiency goes way up!
Rating:
Summary: Best input device I've ever used
Review: I'll start off by saying the Marble FX isn't for everyone. That said, I will say it is one of the easiest input devices to use and maintain. The large trackball takes getting used to, but once you do, you'll never want to use a traditional mouse again. Using the trackball requires only the movement of your fingers, and not your wrist. I found myself resting my wrist and palm along the curved lower portion. You can use your thumb and forefinger to gain accurate control of the pointer on the screen. Maintenance is easy. I usually pop the marble out and clean it and wipe the socket clean with a cloth. There's never any worry about lint jamming it since there are no moving parts. The marble sits on several hard plastic contacts and is the only thing that moves. If you have limited deskspace or are suffering from a sore back or shoulder, I'd highly recommend this device.
Rating:
Summary: Awesome, but beware of Windows 2000 Problems
Review: I've had this trackball for a few days now, and I agree with the other reviewers who rave about it, but if you're running Windows 2000, there are two things you need to know. First, sometimes the link on Logitech's website that leads to the software you need to run in full-featured mode in Win2k fails. Second, sometimes the trackball simply stops working in 2000 (caveat: if you're using a Dell). On the other hand, it's a testament to how great this device is, that I continue to use it despite these problems.
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