Excerpt: I have had this trackball for several years, and recently it suffered an accident : ( I love this trackball and am very sorry to see that Logitech has replaced it with one that is controlled by the thumb, which I find extremely awkward and uncomfortable to use.
Summary: I've been using this trackball for 4 years now and it still works great. Battery life for me is about 4 months, using regular AA alkaline batteries. The textured coating wore of/peeled away after about 2.5 years of daily, 8 hour use.
Summary: I have used one of these for the last few years and I absolutly love it. I ordered this one for a co-worker and she now loves hers. It looks like Logitech is phasing these out so I'm thinking I had better order a spare!
Summary: I tend not to have a great deal of space around my keyboard and being able to move a mouse around can be an issue. Even if using a mouse, I dislike the feeling I get in my wrist with it constantly sliding on the edge of the desk.
Excerpt: I have this trackball for work. Loved it so much that I bought one for home. I am on the computer constantly and have never had any wrist issues. Also good if you have limited desk space to use a traditional mouse.
Pros: Accurate Controls, Ergonomic Layout, Fast Response, Smooth Movement