Rating: 
Summary: You don't know what your missing!
Review: I have used nothing but trackballs since the early 90's and boy have they come along way! Without exception this is the best improvemnt in trackball technology to date. The smoothness is feature I really love! There is no more sticking of the ball and there is more percision to the movement of the pointer. The extra buttons are nice, though the only time I use them is on the Internet going forward or back on a page. If you like using a trackball you will love this one, if you have never tried a trackball you don't know what you are missing and should give this one a test drive.
Rating: 
Summary: Almost as good a mouse as Stuart Little...
Review: The Microsoft TrackBall Explorer is a great mouse to use, once you get use to the layout.This mouse comes with five buttons and a trackball. The far left button is your "left click." The scroll wheel next to it is used to move up and down the page on the screen (can also be clicked so that you can use the trackball to move through the page faster). The button on top of that is your "right click" button. All three of these buttons are used by your thumb. The trackball itself is very easy to use (though you will probably need to adjust the speed). The two buttons on the right are used in conjunction with the "back" and "forward" button on Webpages. Through the accompanying software, you can change these two buttons for other uses if you prefer (but I have to admit, having them there programmed for Webpages sure makes it nicer than having to scroll up and press the "back" button). If you have a small hand, this trackball mouse is not for you. It is a little too big and oddly shaped for small hands to be comfortable using it. A note of caution for anyone who does buy this mouse: It will take some time getting use to. The shape and layout of the mouse will be a little uncomfortable at first. You will have to play around with how best to rest your hand on the mouse so that you will be comfortable. But once you find that spot, this mouse is easy to you, durable, and quite comfortable.
Rating:
Summary: does all right
Review: It beats my old mouse and is easier to use with my big hands.
Rating: 
Summary: Great while it lasts
Review: I have purchased several (10) of these trackballs for myself and friends. I love it -- while it works. Of the five that I have used on desktops at the office and home as well as with laptops, all have failed. In each and every case it is the wire connection to the trackball body. The wires stop making contact and the trackball stops working. You can wiggle the wires for a few days and it will work for awhile. Eventually they all stop working at all. I have kept the balls from the broken trackballs in case I want to play giant marbles. If Mr. gates would make the cable a bit sturdier I would buy another.
Rating:
Summary: Easy to use and extremely comfortable
Review: I just got this for Christmas and I absoulutely love it. I went from a mouse to this trackball, and so it took a while to get used to, but it sure beats using a mouse! My wrist used to ache after using a mouse, but I've had no pain at all with the trackball. Since it has an optical sensor, there's no need to take the ball out and clean it like you have to do with a mouse. And it takes up a lot less space, which is really nice if you have a small desk like mine. I'd recommend this product to anyone. Well worth the money!
Rating:
Summary: Hurting? This might be the product for you!
Review: About a year ago, I was told that I had a ganglion cyst. It was a soft bubble on my hand caused by clicking the mouse. My whole wrist was constantly in pain. My job requires long hours using Word, Excel, and other applications where the use of the mouse was vital. After a lot of research, I decided to buy this product. I selected the product for work because this trackball allows you to click with your thumb and move the cursor with your fingers. It also has a nice scroll wheel. That took a lot of pressure from my hurting area. This trackball is very big compared to other products, but I have very small hands and I love it. Another coworker with bigger hands has the trackball explorer now and he loves it too. It also took care of his problems. Along with this product I also bought an ergonomic keyboard and I got smarter on good posture for the hands and arms. I think everything helped in taking care of a lot of the wrist pain I had on both hands. However, I credit the trackball alone with taking care of the ganglion cyst on my right hand. Now that I will work more from home, I will buy another one.
Rating:
Summary: Easy to use trackbell
Review: I am an avid trackball user, and had to upgrade to this one when my old microsoft went kaputz. I love this trackball. It has every feature I could want in a peripheral, is simple to use, and easy on the carpal tunnels for those of you on the computer a lot. I would recomment this product whole-heartedly.
Rating: 
Summary: did not meet expectation
Review: positives:
looks cool, buttons are customizeable, easy to clean negatives:
Not as precise as I wanted to be. I used to have the logitech trackman fx which broke recently so I decided to get this one. The dots on the logitech trackball are more finer than this one and makes the percision better. If you slowly move the trackball horizontally/vertically, you can see that the cursor jitters. this is NOT a plus if you want to use image-editing programs. also BAD if you need to play a game that requires precise aiming like counter-strike.
also, the upper button located left of the trackball is too close to the wheel. actually, both thumb buttons feel akward except the scroll wheel.
since i don't turn off my computer, the red light can be annoying when trying to sleep. conclusion:
I would recommend the logitech trackman fx over this one. I can't comment on the cordless trackman fx since i don't have one.
Rating:
Summary: a great mouse
Review: i am a huge fan of trackball mice. in my opinion this trackball is one of the best i have tried, it fits my hand perfectly and is very comfortable. it has a tendancy to get dirty kind of fast but cleaning it is a breeze. if you like trackballs this is one to get.
Rating:
Summary: Great Trackball
Review: I brought this trackball when i started feeling pain in my wrists from daily use of an optical mouse. Once i got the microsoft trackball explorer, the pain in my wrist disappeared. The trackball explorer keeps your wrist positioned in one place and makes use of your index finger to move the trackball around. The trackball does need alittle getting use to, but in a week or two, it be second nature like walking. Overall a great buy if you are looking for a trackball.
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