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Microsoft certainly produces solid and well-made hardware; the Wireless Intellimouse Explorer is weighty (with the two AA batteries in) and not shiny, with a black leather look finish on the top and black sides. Unlike some previous mice this finish looks as though it is designed to last and will not wear off over time. As with previous Intellimice the body is big and arched; it is ideal for people with large hands - like me - for whom most mice are far too small, but my 10yr old brother manages fine as well. For me the two extra buttons, set by default to move back and forward between Web pages, are a little too far forward on the left of the mouse and don't fit easily under my thumb (mainly the forward button). The big surprise is the scroll wheel; it is soft plastic and doesn't click as it is rotated, and also moves marginally from side to side to support horizontal scrolling. I suspect that the feel might be too imprecise for gamers - the middle mouse button click, made by pressing on the scroll wheel, is especially vague - but, after a little getting used to, the soft wheel is much more comfortable than a hard plastic scroll wheel. Installation is very simple; remove any existing mouse drivers, install the 6MB of driver software, plug the (large oval) receiver unit into a USB or PS/2 port, reboot and the Intellimouse is detected on restart. The Intellipoint 5.0 driver offers the usual options, such as scrolling speed in both directions, acceleration rate, double-click speed, choice of mouse pointer graphics, and button remapping, and also gives an indication of battery strength. My only criticism of it is that the vertical scrolling is so fast only the lowest speed option, or close to it, is remotely viable for games. The "press Control to locate the mouse pointer" (by a series of concentric circles) option, which was present in previous Microsoft drivers and proved useful on laptop screens, has been removed, as has the option to display a short trail of pointer images behind the actual pointer. Finally, a round of applause for the supplied batteries being Energisers rather than some mysterious Chinese or Korean brand. All in all, an impressive piece of hardware, although may not be for those with VERY small hands.