Customer Reviews
A fantastic product 
2008-08-11
I purchased this trackball after months of contemplation between this trackball and the more expensive version, and even buying and then returning 2 types of logitech track balls. After reading many reviews, and from the advice of my doctor i did buy this trackball. I have had no problems with sticking, a rough moving ball, there is no blank spot on the pattern of my ball, and i think the buttons are in the perfect place for use.
I have the equivalent of golfers and tennis elbow in both arms as a result of over-mouse usage (i use pretty much the mouse in autocad/autodesk map all day long and I use both or either hand(s) with the mouse). My GP was telling me it was carpel tunnel, and nudging me towards the way of the wrist surgery, but he was wrong, and my problem was inflamed trigger points around my elbow. Let's thank my chiropractor for a real diagnosis, yes they are also real doctors.
The Kensington trackball is less stressful on my arms and hands than a traditional mouse, and also gives me another alternative to 'mix up' the repetitive motions. It hasn't solved my problems, but it sure has helped.
Great size for PC 2008-08-03
This is a perfect sized trackball. Easy to use-- pre figured for Windows XP but easy to change configuration. Studied other trackballs and like this the best.
Kensington Orbit Optical Trackball mouse 64327 great for the price!
Kensington Makes good products. 2008-07-14
I own a trackball Expert mouse, and bought the Orbital trackball mouse for my portable. Both are excellent, the trackball has worked for many years, and once, when it failed, was replaced for free by Kensington.
I am very please with the way the product works and Kensington's service.
Leon
Better than most, ball optical pattern needs improvement 
2008-07-04
I am an experienced Kennsington trackball user and find that their products have matured nicely over time. They now have a hole in the bottom so that dust and hair will fall out onto the desk instead of accumulate in a wad that causes malfunction. This model is a bit on the small side and the buttons as well could be a little bigger, but the size is usable. The action and heft of the ball are just right, very smooth and feather touch.
But the biggest (very big) complaint is the stalling, reported in previous reviews. It is not dirt--It's the patterning on the trackball. The swirls are broken by a solid area and the optical sensor has difficulty in picking up movement in that area. Every time it stalls, I look at the ball and note that this area is over the sensor. This is a big deal and very annoying in normal operation. There needs to be a recall and redesign.
Best trackball at low price 2008-06-16
This is one of the best trackball I've used. Being a graphic designer I've always been using trackballs, they are very convenient in using on your desk specially when you have your desk well cluttered with other items. In addition you can use a trackball on any surface, you don't have to worry about finding an even flat space to move your mouse. Comparing to various trackballs available in the market, this Orbit from Kensington is the best one at very low price and it's cosmetic outlook is also well impressive as its very precise optical tracking ability. I would highly recommend this for anyone who is looking for a trackball at low price.
kensingtom trackball mouse 
2008-06-09
USB Connectivity / 2 Button Operation / For Windows PC and Macintosh / Maintenance Free Optical Technology
It's OK but not GREAT 
2008-05-14
This mouse is OK but certainly not great. It's very light, so moves around alot, The buttons are placed a little odd for easy use if your hand is placed so that the fingers can use the trackball properly. The design has tried to make the buttons look good instead of making them more useful. They are also a little hard to press for quick use because the shape gets small where my thumb would normally rest so I have to hit it just right to get it to work. It's really not big enough to hold your hand properly so you don't get any repetitive motion problems. Unless you've got really small hands, you're probably going to find yourself holding your finger joints UP so your fingertips can work the ball. My hand doesn't rest easy in that position. After several days of trying to make it work for me, I'm sending it back actually. I was replacing a well used Kensington Turbo Mouse, and find that I just need to bite the price bullet and get the Expert Mouse
The Best I've Found! 2008-05-05
I used the old ADB version before this one and they're both amazing. It's the only mouse that keeps my wrist from hurting after multiple long days of work.
Some of the finish gradually wears off, but mine is still working 100% after having it for 4+ years, and only needs cleaning every few weeks.
I've tried finding a different mouse several times, just to try something different (or something with more buttons, scroll wheel, etc) and every time end up back with the Orbit.
Something to note, is that it's not a trackball - you don't control it with your palm. You only use your fingertips, allowing you to put your arm and hand in a comfortable position and leave them there.
good item 2008-04-22
very happy with the trackball. I am on the computer a lot and have pain in the arm and elbow, this has helped so much.
The best mouse. 2008-04-21
I just bought my third Kensington trackball mouse. This is a really great mouse. Unlike the Logitech trackball (which I bought and subsequently replaced), the sensitivity and "feel" are just right.
The biggest advantage of a trackball is the ability to get your cursor in exactly the right place, and then release the ball (i.e. the positioning mechanism) prior to clicking. In this manner, the cursor won't move as you make the click. This has real advantages for the graphic artist.
Another advantage is not running out of mouse pad or cord, since the mouse itself stays stationary. It takes up less room on your desk.
I don't believe it would be a good mouse for gamers, though I do not use my computer for games and perhaps there are some settings changes that would allow it to be used for such. It's more of a precision instrument.
