Comments about Kensington� Orbit� Optical Trackball:
This is not the first trackball I have used but I find this one very comfortable and easy to use. It was easy from the minute I took it out of the package. I am very happy I bought this trackball, it works extremely well. I am on the computer all day and it makes a big difference. Before using a trackball I had wrist problem that are virtual nonexistent now.
Bottom Line Yes, I would recommend this to a friend