Razer delivers on the performance and it is pleasing to feel the response time wirelessly with absolutely no lag. Being on the cutting edge, however, does come at a price of a $130.
Excellent tracking and superb surface calibration; Sensitivity may be configured in specific stages (1-5); No lag on wireless operation; Pleasing form factor and well weighted
Somewhat short battery life for a gaming mouse; Driver issues with system coming out of sleep mode