Rating: 
Summary: pretty good but...
Review: I have to admit that this mouse was a little over hyped for me. It's great because it looks cool and takes up less room than a regular mouse. However, after two months of using it, I don't think it's more precise than a regular mouse or that it's any better for your wrist. I suggest people try it out before they buy it if they have never used a tracking ball type mouse before. Don't get me wrong; it's a good mouse, but I don't think it's the greatest thing in the world.
Rating:
Summary: pretty cool
Review: I bought this after I stepped on my earlier conventional mouse (don't ask why!). Now I don't think I can go back to mice as the world knows them. This is a very helpful product and is more comfortable, more accurate and requires lesser care than mice we are used to (though I would not recommend trampling it either). Easy on the wrist, because there is virtually no wrist movement. Scrolling function works pretty well for me using the combination of keys. Only thing is that it scrolls in jerks rather than smoothly. For this I blame the bundled software and my system-resource poor computer. Because of this, the software has stopped working on some occassions, especially the scroll function. This is the only reason for me not giving it 5 stars. Remember, it will spoil your mousing habits!
Rating: 
Summary: The search for the ideal pointing device ends here.
Review: The Logitech Marble Mouse Trackball is possibly THE most intelligently designed pointing device for PCs and Macintosh personal computers. First of all, in spite of its name, it's a trackball, the superior successor to the computer mouse. Unlike a mouse, it sits in one place and your fingers guide the pointer. You click on menu selections, icons and such with your thumb. It takes mere minutes to get used to this method of moving around the screen but after you do, using a mouse will seem cumbersome and quaint (which it is). Beneath that black-dotted burgundy ball lies the secret of the Marble Mouse's responsiveness, longevity and reliability. An infrared emitter and optical pickup track the movement of the ball, not mechanical rollers which quickly become gunked up with skin oils and dust. You'd have to let a really thick layer of crud accumulate on the ball before you'll see an impact on the Marble Mouse's performance. Small enough to tuck into your notebook, laptop or PowerBook's carrying case, the Marble Mouse is pure computing bliss compared to jittery trackpads, wobbly finger sticks and erratic rollerballs. PC users running Windows XP and earlier can simply install the PS/2 adapter and plug the Marble Mouse into the PS/2 mouse port without installing any software. With Windows 98 and later, you can pop off the PS/2 adapter and plug the Marble Mouse into a USB port. Macintosh owners running Mac OS 8.6 or higher will need to install MouseWare from the included CD-ROM and disable the Macintosh Mouse control panel in the Mac OS Extension Manager. Unlike its more expensive TrackMan siblings, the Marble Mouse is fully ambidextrous, with equal-sized buttons on both sides. The included Logitech MouseWare (also downloadable at www.logitech.com) makes the Marble Mouse behave like a 3-button mouse on PCs (you press BOTH buttons together to access the functions of a third button) while giving Macintosh users one-finger, one-click access to content menus (shades of Windows, eh? :) ). Windows users also benefit from the new page up/page down buttons located just above the main buttons. Finally, though the price might seem steep compared to a $5 mouse you could pick up at Best Buy or CompUSA, recall how many of those cheap little rodents you've owned and thrown away in the course of a single year.
Rating:
Summary: Marble Mouse rocks!!
Review: I have worn out one of these (after 5 or 6 years), use another one at home, and just got a new one (the 5 button model shown here) at work. I love it!! It's very comfortable to rest my hand on, with less hand & arm fatigue. It also requires much less desktop space than a conventional mouse, and less cleaning. Cleaning, when needed, is a 10 second deal. The ball pops out with a gentle pull, clean the dust off of the three contact points, and snap the ball back into place.
Rating:
Summary: Great Little Trackball-Mouse
Review: My trackball-mouse at work squeaked its last squeak, and I needed to request a replacement from our IT department. I have an older Logitech optical trackball at home, so I ran a search on Amazon and found the Logitech Optical Marble Mouse. It looked compact and easy to use, and I've been pleased with the optical technology in my home trackball, so I made my request to IT very specific. I also knew the price was attractive. Well, I got what I asked for, and it's not only better than my old work-trackball, but it's also better than my optical trackball at home. The Marble Mouse is compact, very easy to use, interesting-looking (not a high priority in a trackball or mouse, but it doesn't hurt), and inexpensive. When it comes time to replace the trackball at home, I certainly know the trackball-mouse I'll be getting.
Rating:
Summary: Great mouse replacement and wrist-saver
Review: I bought a Logitech Marble Mouse about 3 or 4 years ago in an attempt to stave off RSI. My mouse was causing wrist strain, partly because I didn't have room for it on my keyboard drawer and was having to reach up onto the desktop for it. The marble mouse solved both my wrist pain and space problems -- it's slightly bigger than your average mouse, but since it stays in one place it doesn't need nearly as much room, and the index-finger ball is very intuitive. It took me maybe two minutes to adjust, and the movement is smoother than my mouse ever was. The Marble Mouse is extremely durable and has given me no problems in the almost 4 years I've owned it. It outlasted the first computer I used it with and will probably outlast the current one too. I use it for everything from web-surfing to drawing, and I like it so much I'm buying a new one to use at work.
Rating:
Summary: Nice product
Review: This mouse is the best I have used. I have one on the left side of one computer and on the right side of another and have no trouble going back and forth. The ball is large and easy to move... smooth operation. Having four buttons makes programming them for various tasks very useful as is the USB/PS2 option. Highly recommended.
Rating:
Summary: Lefthanded and loving it
Review: This mouse is great. For the simple fact that if someone else gets on your computer, if you are left handed, and moves your mouse it is not a big deal. With the typical push mouse, you have to restring it around your keyboard etc.. with this mouse, it is nothing. Once you get 'climatized' to this type of mouse, you will not go back to the typical push mouse. Due to this mouse being laser guided, with the special ball combo, it is very sensative and accurate. I started using this moust two years ago and I have had nothing but sucess. None of my purchases from Logitech have died or otherwise failed. This product is very rugged, and especially easy to clean, just lift out the ball and wipe the metal 'knobs'.... and you are done. have fun.. a great deal.
Rating:
Summary: I own two and would never go back to a regular mouse!
Review: These are one of the best inventions since the Internet!
They have looks and intelligence. With the trackerball being moved by my fingertips I get less wrist and hand fatigue from longterm use of the mouse. I use one at work too and it does cause curious stares and questions but once you use one and give it a fair try you will be impressed with the agility. It is easy to clean and doesn't get gunked up like a regular mouse does. The price is definitely right too!
Rating:
Summary: Fantastic value, not quite as refined as Trackball Explorer
Review: Overall this is a solid, optical trackball at an awesome price. Its not as refined as the Microsoft Trackball Explorer, but not nearly as expensive. Good
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- Incredible value
- Pretty comfortable design
- Excellent control Bad
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- The ball falls out very easily. This is VERY annoying if you plan to use this with a laptop, as if you tilt the trackball it'll go rolling away... - The buttons aren't quite as well placed or as comfortable as the Trackball Explorer's - I miss Microsoft's glowing optical light; it may be a little cheesy but it re-enforces the fact that its an optical Overall
------- Hey, it may not be the best if money-is-no-object, but for $20 its great!
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