Pros: Logitech makes great products, easy to use, setup, they use regular batteries, & every Windows PC recognizes it.

Cons: NONE!

Pros: To me the best mouse there is.
No chasing a mouse around.
every in a stroke of your thumb.

Cons: Needs a tacker pad to hold it in place.

Pros: Not having to move mouse is really great.

Cons: Mouse is a little too big for my hand span. But I am starting to get use to it.

Pros: Fast delivery

Cons: Where, the, Hell, is my oin/off switch on my mouse? To rephrase no its not that i can't find where it is on the mouse. They literally didnt Freaking put it on the mouse they "Forgot" and its not there

Other Thoughts: I've had this trackball before and i love it but don't buy from " Adorama Camera" At the very least. This is incredibly disapointing i can literally see into the frame of my mouse because the switch is missing

Pros: If you are a graphic design person, who is tempting carpel tunnel syndrome by frequent mouse usage, this is the mouse for you. Yes, until your thumb gets stronger it will be a bit sore at first from the isolated motion, but heads and tails over other solutions this will stop most of your arm and wrist movement.

Cons: I liked the old "Wired" USB model that was available prior to this one. It was dependable and cheaper. This probably led to its demise as no profit from replacing since the device was designed for longevity.

Other Thoughts: With a trackball on my right and space navigator on my left.... I'm in designer heaven.

Pros: I was more than impressed because usage was no different than my corded mouse.

Cons: NONE

Other Thoughts: I plan to buy another in the near future for my backup computer.

Pros: Easy setup, easy software installation, and it is a wireless device.

Cons: No cons at the moment.

Other Thoughts: If you are using the device on a Mac, it is pretty much a plug and play device, however I would make sure to download the software from the Logitech website to be able to use all the device features. More specifically the forward/back buttons by the left-click button. I would recommend this product to users who like wireless devices and users who like trackball devices.

Pros: This was my fifth Trackman model, since this purchase I've bought a second one of these to keep at the office. The Unified Receiver wireless tech is a much needed upgrade from their past iterations.

Cons: none

Other Thoughts: When you open the package, check the ball to make sure it is perfect. any imperfections will seriously irritate you over time.

Pros: Comfortable: great fit for my hands. Same button layout as mice. Great precision and control. Never have to move, so good for small spaces. No stress on my wrist, and I can zoom across the screen with a flick of my thumb. The best mouse/trackball I have ever owned.

Cons: Quality (or lack thereof) First trackball failed after about a year with the left click button not responding or double clicking. My next one stopped responding to movement after two years. The third one also stopped moving after a week. My original red corded trackball lasted for over 10 years without a problem. The blue cordless version just seems to have very poor quality components.

Other Thoughts: I love this trackball, but it broke my heart. It's comfort and precision keep me coming back, but then the pain starts again. If ANYONE else made a trackball in this style - I would give them a try. I am willing to spend more money on quality components. I bought a 'Das Keyboard' just for the thrill of such solid workmanship. Can anyone make a 'Das Mouse'?

Pros: Functions well, does everything you expect it to do.

Cons: Short lifespan before buttons wear out. As other reviewers noted, after some period of use (for me, about 2 years) the mouse begins to send multiple clicks when you press the button only once. This is apparently caused by the microswitch failing. This is a pretty common issue apparently. At least the mouse comes with a 3 year warranty, and I am trying to go that route to get this one replaced.