Kensington K72355US Pro Fit USB 2.0 Wired Mid-Size Mouse for Right Hand Use - Black

I wanted a PS/2 connection and forward/back buttons. This is one of the very few mouse products that fit those criteria. It's maybe just a little smaller than the average sized mouse (compared to what I've used in the Logitech and Microsoft product lines), but it fits me well. Originally, I bought the same style Kensington mouse that was termed "full size." I had to return the "full sized" mouse and get this one. These two are my first ever Kensington input products. I like them. Buttons feel right, response is precise, the mouse is light and should reduce fatigue bit it doesn't feel "cheap." In Window 7, no special driver is needed. The generic Microsoft mouse driver will automatically install and all buttons become functional. Note that the scroll wheel can be pressed and used as a button. The scroll wheel button works only in applications that are designed to use that function--most often as a "universal scroll." I surely wish universal scroll worked in Windows Explorer but it doesn't. I also can't get it to work in Firefox. Universal scroll, however, does work in Internet Explorer, Microsoft Word, Microsoft Excel, and Adobe Acrobat Reader. (Just Google "universal scroll" to see what that is.) It has a generous cord length and includes a USB to PS/2 adapter. How long will it last? That remains to be seen. When it breaks or wears out, I'll try to remember to come back here and add a review about that.