The Lachesis sets the benchmark for all high sensitivity mice with its 4000 DPI sensor that can be adjusted in 125 DPI increments. The fact that the performance of the sensor scales so well makes it easy to adjust to because it performs equally well at all DPI settings. One of the performance aspects of the new 4000 DPI laser sensor that shocked me the most was the fact that Razer has managed to overcome the problematic high lift-off distance that most second generation laser mice have. With a lift-off distance on most surfaces of only 2 mm the Lachesis is almost as good as an old optical mouse in that particular aspect and actually pulls ahead of the infrared sensor equipped Razer mice.

It's clear that Razer has solved a lot of the problems with laser sensors in the Lachesis and has successfully created a mouse that suits medium to high sensitivity gamers perfectly.

The comfort level achievable with the Lachesis is quite good if you have a normal sized hand and only use your fingertips to control the mouse. I wouldn't recommend this mouse to any low sensitivity gamer because of the shape, it simply doesn't work well when you place your hand on top of it due to the placement of the palm support.

Overall the Razer Lachesis is a remarkable mouse for medium and high sensitivity gamers that features a uniquely performing laser sensor that promises a lot, and delivers.