Rating: 
Summary: Comfortable and Cool
Review: I can never seem to get a mouse with more than 2 buttons to work in a game. That said, I was thrilled when I was able to get all 5 buttons (including the wheel) to work on this mouse in practically any game I have. The large ball has nice weight, and spins quite smooth, excellent for when I have to do a 180 and railgun someone chasing me.The trackball needs to be cleaned about once a week (maybe I'm just dirty), looks very cool, is very comfortable in a large or medium hand, and works very well. Children or people with small hands may have trouble using the 2 buttons on the right side. I'm definately happy with this purchase.
Rating: 
Summary: Trackball improves with Modification
Review: I've been using trackballs for years, finally replacing my old Logitech with the MS Trackball Explorer. I really like the addition of the mousewheel and the four programmable buttons. My "complaint" has been that the design cause me to bend my wrist backwards to fit the shape. Solution: I added about 1 1/2 inches of height to the front (toward me) of the trackball, elevating that end so that my wrist no longer has to bend so dramatically. MUCH, much better! While I wish the trackball itself were bigger, the optical tracking is smooth and trouble free. All in all, a good product, made better for me with some tape and old wrist rest foam.
Rating: 
Summary: Tough on the Wrist
Review: This mouse is a bit tough on your wrist. As I read in another article that it was tough for small hands. I'm a pretty big guy thus have some big hands and its still tough on my wrist. I find that it seems to angle a little to bit upward causing some stress on my wrist. Enough stress that I'm using my other arm to browse the web while I look for a new mouse. The mouse works great and has a great deal of buttons for many uses but the angle is just to hard on me.
Rating:
Summary: Couldn't wait to get it!!!
Review: I ordered this in replacement to a wireless optical mouse that I had for about a year and a half. I am still using this, I got sick of carying it with my laptop. Every time I wanted to use it, I had to get batteries out... The whole song and dance. When I started looking, I was looking for a "mini" wireless notebook mouse, something not as cumbersome as the last mouse I was carrying. I read the reviews on any of the mice that looked like they were worth the money, and they all didn't seem like there were any that were worth the money. Most of them said that they lost the connection intermittently and had trouble connecting. I thought, what is the next step. I didn't want to get a mouse with issues like that, and I though of the trackball we use at work, and figured I would check them out. A trackball was more practical for me because everyday, I take a train into school, two hours each way. I use my laptop on the train, and because I don't have a flat surface to use the mouse on I figured the trackball would work nicely. Its great. I have read some reviews about people saying the motion on-screen is jumpy, why I don't know maybe they had a defective one or their computer didn't want to communicate with it they way it should. If you read the Technical data on the trackball Explorer, it resamples 1,500 times a second. Just think about how smooth the cursor moves around the screen if it resamples that often. My dad smerked when I showed him what I got, because he usually follows me in what I buy, he was like "It's not wireless". I think that is a small price to pay for such a nice pointing device.
Rating:
Summary: Nice alternative to the conventional mouse
Review: I bought this mouse for my father because of his bad shoulder. It seemed moving his whole arm with the conventional mouse upset it. Well, he seems to like this one because he doesn't have to alter the position of his shoulder to move the cursor-- The mouse stays in one place while the ball is moved. It's a good product and I was able to install it without any problem.
Rating:
Summary: If only it would last
Review: As a trackball, the ergonomics are fantastic. Perfect for precise use (graphics). Alas, very pricey considering they really don't last long. You will be lucky to get a year out of one before one (or more) buttons stop working.
Rating:
Summary: Best Trackball
Review: I have owned more than 15 different trackballs and this one is the best by far.
Nuff said.
Rating:
Summary: Do you want more accuracy and comfort than a regular mouse ?
Review: If "yes" then you need to buy this trackball. This trackball is ergonomically formed, so it is very comfortable because it supports your wrist's navicular bone. (Most carpal tunnel aggravations occur from swelling due to excessive strain and movement to that bone.) It will drastically reduce your wrist's movement because the trackball is the mouse and only your fingers move the ball, while the base remains in one place. Note: You absolutely need to install the software that comes with this Microsoft Trackball Explorer mouse while you still have your old mouse plugged in. Then shut down your computer, plug in your new trackball mouse. Re-start and you ready for the smoothest Internet cruising imaginable.
Rating:
Summary: Very good trackball..
Review: I must admit, this is a pretty good trackball. After using a mouse for many years I can't believe I hadn't switched over to a trackball sooner. Fisrt of all, I now don't have to worry about manuvering my mouse over my clutered desk or worry about the dang blasted cord connected to my mouse. Second, this thing feels pretty natural. The buttons are pretty much where the should be which allows me to move click and search with ease. I work on a computer everyday, all day, this was definately a good investment.
Rating: 
Summary: AWFUL COMPANY
Review: I have been waiting almost 2 months for something that should only have taken 5 days!! DO NOT ORDER FROM THIS COMPANY!! THEY WILL RIP YOU OFF.
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