While this design requires you to keep track of the cable (or find a full-USB-to-mini-USB cable somewhere), we much prefer it to the sort of clunky recharging stations that Logitech has used in the past and that Microsoft still uses in a trimmed-down form. Such stations prevent you from working while your mouse recharges.
Physical tweaks
Otherwise, Logitech has only implemented a few tweaks to its successful MX mouse formula in the Performance Mouse MX. You still get Logitech's innovative scroll wheel, which lets you switch between ratcheted and free-spinning scrolling (the latter is excellent for navigating long documents or Web pages). A new button on the thumb side also lets you toggle the scroll wheel to act as a zoom control. You can reassign any of the buttons via Logitech's intuitive SetPoint software, including mapping one of them to switch between two custom dpi settings.
Logitech has also tweaked the form of the Performance Mouse MX. It takes the basic design of the MX Revolution from 2006, but has a deeper channel for your thumb and a narrower heel. The result gives your thumb a snug grip on the mouse, which makes a small but noticeable improvement to fine motion control.
Conclusion
The Logitech Performance Mouse MX is expensive, but worth the money. Even if you don't need to exploit the versatile Darkfield sensor, it offers enough other useful features to justify the investment.
Additional editing by Charles Kloet
Android App 
RSS Feeds 
iPhone App 
Newsletters
User reviews1
Add your review
Alistair Lowe 28 December 2010
Comment: Excellent mouse, runs smoothly thanks to its 1500DPI resolution and dark-field laser tracking.
Points not noted in most reviews that make this mouse a good buy are the replaceable AA battery, the mechanical switch for the scroller and large rubber reef. These are good solutions to three major issues I've encountered in the past where either battery charge life diminishes, the scrolling mode change mechanism breaks or the mouse feet easily peel off. This mouse was built to last.
I would say it falls short of a 5/5 because it has no real new innovative features, buttons supplied are average, if you don't have a reflective surface, dark-field laser tracking means little to you and the DPI is good but it falls short of a gaming mouse. It's a good all-rounder that excels in no particular area.
I will also note there are some definitely faulty mice in circulation. A common error appears to be that the mouse freezes after inactivity for 1-2seconds and in the case of my second mouse there's a hiss that can be heard from the mouse. Logitech support have confirmed both of these issue are hardware related, if you get this you should return your mouse, I've just been unlucky enough to experience both of these issues!
See all user reviews