The Laser Mouse 6000's shape means your fingers rest accurately on the buttons. It features a large thumb-indent, much like on the Logitech MX1000, which is pleasantly rubberised, as are the rests for your ring and little fingers. The one disadvantage to its shape is that the 6000 is not for users who like to lift their mouse.
The scroll-wheel is almost perfect - as long as you're not a gamer. For document and general windows use, it might have been my favourite four-way scroll-wheel, were it not for Logitech's recent implementation of ‘microgear'. But the very thing that makes it such a pleasure to use in documents is its downfall for the demanding gamer. Because unlike many other mice, the 6000's wheel-action is smooth, and scrolling is seamless, lacking any hint of the ‘click' FPS fans especially will want.
On the other hand, the included IntelliPoint software (ah IntelliMouse, we miss you) offers driver support for every Microsoft mouse ever made, including of course the Sidewinder gaming mouse. What this means is that it brings game-specific functions to the 6000, including button-remapping, extensive macro-recording, and a 180-degree turn option. The software is a breeze to set up and customise to your taste. All of which makes the scroll-wheel even more of a pity - trying to switch weapons in a frantic fire-fight is like rolling a dice and hoping your number comes up.
There have been some reports of lag and juddering with the 6000. While on one computer we did experience some of this initially, bizarrely, plugging the dongle into a different port seems to have sorted the problem out.
Overall, the Microsoft Wireless Laser Mouse 6000 is a very appealing package - especially for the mobile user, though keep in mind the mouse is full size. If you live in the UK it's a touch on the expensive side, while in the US it's great value. Unfortunately, demanding FPS gamers need not apply due to the seamless scroll wheel.