Yeah, I know in previous reviews I said I overspent with foot pedals, buuuut. this is so nice. I bought it for work and my wrist just doesn't hurt like it did with my anker mouse, I want a rollermouse red but cannot afford that hefty price tag anytime soon so I bought this one and oh my word.

it is the easiest to use. having arthritis, this trackball eases the joiint pain when using it. everyone should use it.

I haven't used a trackball before so I have nothing to compare this to except for my Logitech mouse that is so responsive to my touch and this one isn't quite that. I was used to giving the scroll a twirl and having it run to the top or bottom of the page - just like that!

I haven't used a trackball mouse before, and this is rather fun. I grew up using computers many hours a day and have never suffered any RSI symptoms as a result of extended use due to having sort of adapted to computers, and bought this more as a venture into alternative input methods.

I use this at work because i have been getting pain in my hand from my normal mouse. I bought a shark style mouse and that helps some but i find switching between thos mousr and the anker shark fin work best. So i leave them both on ny desk.

My wife is developing rheumatoid arthritis in her fingers and using a traditional mouse can be painful, but this trackball is so much easier for her as the can roll it with the palm of her hand and clisk with the heel of her thumb.

This product is not for everyone! It will take some time to get used to! If you're at a desk, you might find it suits your needs better. Unless your arm is supported during use, you might not like it.

Very well built and sturdy! 5 year warranty

This product is not for everyone; I have a logitech trackball with the ball on the side and I find that works better for me as I stand while i use it and my arm is not flat on the surface.

The blue ball is big, one and a half inches diameter, great for easy and speedy handling and accuracy. The scroll ring is easy to use and allows me to scroll up and down in a more controlled manner.

My Microsoft Thumb Ball died after 15 years. The Kensington was the perfect replacement at a good price. I have purchased three of these and they are very comfortable and convenient.

Still getting used to it, but it works well enough