Pros: good look and feel, good price, quick delivery, because its 800 DPI it will scoot across a big screen when the mouse control panel is tweaked, wheel responds well, optical (so no mouse pad required)
Summary: Middle button did not work until mouse driver was installed from the website. Excellent mouse.
Pros: Very comfortable for long hours of gaming, tracks accurately and has responsive keys. Rugged feel of both mouse and cord, I expect this mouse to last a long time. Would purchase again.
Cons: Middle scrolling appears to react differently to separate applications, going from very sensitive in photoshop to moderate for web browsing. The good news is this can be adjusted in the Mouse Control Panel.
Summary: The Good: My computer doesn't like USB mice. After years of trying to figure out how to make a USB mouse work I FINALLY found this mouse. No more mouse cursor jumping all over the place and no more annoying double clicks. This mouse is nice, very nice. Its very sensitive. After awhile I thought it was too sensitive but now I love it. If you have mice trouble and are using USB give this PS/2 mouse a try.
Summary: The Good: Full size mouse, comfortable fit in the hand, smooth scroll (the 800dpi is so much beter than the 400dpi), nice tactile feel on the buttons and the scroll wheel yet no "accidental clicks" because my fat fingers got sleepy, and ths ps2 version gives me an extra usb port to work with so it pays for itself. All in all, a great mouse.