Every mouse is really about feel and preciseness - so when I said lasers I was kidding but not actually kidding. The laser tracking in this mouse is likely the best on the market. In my line of work I need the ability to insure my clicks are exactly where they need to be, as well as have the ability to multitask as quickly as possible. With this mouse you have horizontal scrolling, the ability to change desktops using the gesture button, and two more self-assigned functions of your choice. That makes navigating this
a bit easier for me. Also, the scroll wheel has a clutch mode you can activate and deactivate by touch, which gives or takes away the scroll 'click'. You can go 'line by line' or 'infinite' scrolling. This is cool because sometimes you may prefer smooth scrolling while utilizing some functions.
Of course, for the average person this may be unnecessary or overkill, for me it's a boon with the type of workflow I keep.
Lastly, ergonomics is important. I can't stress how easy it is to get carpal tunnel with the wrong mouse, lol