Rating: 
Summary: Ok, makes my monitor change colors
Review: 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.
Rating: 
Summary: Love dem track balls
Review: Hi I'm A home schooled student and so I'm on the PC a-lot. So after my wrist was throbing from a history Quiz useing a mouse, I figured that I should get a trackball. Problem is I'm a lefty. This thing works extremly well in both hands. My only beef is that the ball isn't under my thumb. but if you want a smooth ride get this.P.S. If anyone knows or is a Logitech employee please make a lefty thumb trackball.
Rating:
Summary: Lefty Trackball
Review: Hi I'm A home schooled student and so I'm on the PC a-lot. So after my wrist was throbing from a history Quiz useing a mouse, I figured that I should get a trackball. Problem is I'm a lefty. This thing works extremly well in both hands. My only beef is that the ball isn't under my thumb. but if you want a smooth ride get this. P.S. If anyone knows or is a Logitech employee please make a lefty thumb trackball.
Rating: 
Summary: Great hardware, limited software...
Review: I also own a Kensington Orbit, and at the time I purchased it though that it was the top of the heap for trackballs. However, while extremely comfortable (and stylish) I quickly became frustrated with having to clean the mechanical mechanisms on a regular basis. After fiddling around with a Logitech Marble Mouse at a local office supply store, lo and behold Santa put one under my tree. What a difference optical technology makes! The Marble Mouse is one "smoooooth operator". (Appologies to Carlos Santana.) With nearly 3/4 of the big red ball sticking out of the ultra smooth case, the Marble Mouse requires minimal force and movement. Because of it's optical technology, cleaning is a snap. Only three support bearings have to be wiped off every now and then. I should add that I've never been forced to clean the Marble Mouse, because dirt does not seem to affect it's operation. The two buttons on either side of the ball are large and fairly sensitive, requiring minimal force to use. Well constructed! Lastly, but certainly not the least important: The Logitech Marble Mouse is fairly inexpensive. One major negative: The software that comes with the Marble Mouse, MouseWare, is severely lacking. It only affords the barest minimum for configuration, and there is no support for "chording". Logitech has pretty steep software competition with Kensington's highly configurable and customizable MouseWorks software. If Logitech's MouseWare software were to be much improved, I would easily give the Marble Mouse five stars.
Rating:
Summary: Optical Marble makes it work 100% of the time!
Review: I can't add much to some of the reviews here except to say that my excitement for this product comes from its ability to keep working all the time. I was plagued by the constant cleaning of mice and trackballs.....the cleaning wasn't bad, but the problem was that the tracking performance just got worst and worst, pretty much on a daily/hourly basis until you finally got high enough blood pressure to drive you to clean the ball.(before my head exploded) Well, this optical marble technology makes that a nightmare of the past. It works all the time, and does not seem to degrade with time. It has taken my mouse frustration, literally, down to ZERO! I highly recommend this product! (I'm buying a couple more for my wife and kids who have also finally had enough fighting the dirty mouse ball blues)
Rating:
Summary: Best Trackball
Review: I have been using this trackball for 18 months now and just love it. Easy to keep clean. Fits your hand like a glove. I have tried other tackballs but found them hard to keep clean. This is the best optical trackball I have found for the price. I now
own four and the first one is going strong.
Rating:
Summary: Multi-function trackball
Review: I was not a trackball person, but realized I needed one for my first-person games. After a short transition period, I have come to love this little device! I use it for business applications as well as for gaming. I have come back to buy another one for my office. It lacks a "wheel" but the driver has a "3rd button simulation" which has many possiblities. One of which is a wheel simulator. Good for scrolling through web pages or word documents or whatever. I do not find that this device 'drifts' as was mentioned above. It is simple to clean, mostly maintenace free (depending upon how much you sweat when playing first-person games). The optical sensor works like a charm. The ball is easily removable.. just make sure you don't let the ball fall out when transporting the trackball..
Rating:
Summary: Multi-function trackball
Review: I was not a trackball person, but realized I needed one for my first-person games. After a short transition period, I have come to love this little device! I use it for business applications as well as for gaming. I have come back to buy another one for my office. It lacks a "wheel" but the driver has a "3rd button simulation" which has many possiblities. One of which is a wheel simulator. Good for scrolling through web pages or word documents or whatever. I do not find that this device 'drifts' as was mentioned above. It is simple to clean, mostly maintenace free (depending upon how much you sweat when playing first-person games). The optical sensor works like a charm. The ball is easily removable.. just make sure you don't let the ball fall out when transporting the trackball..
Rating: 
Summary: Don't waste your money
Review: I was very disappointed with this mouse. I previously owned a Logitech mouse that I thought was wonderful. When I bought this, I had faith that I would again be satisfied. Unfortunately, the shape is awkward for my hand and the pointer keeps slipping down the screen when I'm not touching the mouse. I am going to be returning it immediately for my money back.
Rating:
Summary: Don't waste your money
Review: I was very disappointed with this mouse. I previously owned a Logitech mouse that I thought was wonderful. When I bought this, I had faith that I would again be satisfied. Unfortunately, the shape is awkward for my hand and the pointer keeps slipping down the screen when I'm not touching the mouse. I am going to be returning it immediately for my money back.
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