The 5600 DPI version of the old Lachesis design brings only a few new things to the scene. The basic layout and functions of the mouse remains the same except for the newer better Philips sensor used. The small yet noticeable tweaks to the design are all quite neat and the mouse performs almost as good as the more expensive Agilent sensor powered mice we have tested. The new Philips sensor is great, not because it has a maximum DPI advantage over the old design of 1600 DPI, but because it is slightly less affected during lifts. Also the addition of a teflon skid pad around the sensor is a neat trick to reduce the amount of unwanted Z-axis tracking, and drag on cloth mats. The Lachesis is primarily a finger controlled mouse and the design should therefore be judged as such.
Is this mouse worth the extravagant asking price of $79.99? that depends hugely on how you want to control your mouse. If you use only the tip of your fingers to move it, then yes. If you on the other hand have large hands and use a palm grip, this mouse will not suit you. This mouse is among the most expensive on the market yet it caters to a very specific crowd where it delivers excellent performance.