Vortez tried the Logitech G900 CHAOS Spectrum
A quote from the article:
Logitech are arguably one of the most established names in computing peripherals and it is big news when said established brand makes a statement such as 'Our best gaming mouse ever'. The professional grade wireless connection delivers a 1ms report rate which can outperform wireless and wired competitors. It also uses Delta Zero Technology along with the PWM 3366 sensor to provide highly responsive, zero smoothing, zero acceleration performance. Logitech have also used clock-tuning technology, to reduce the sensor power consumption, by doing so they have been able to create a wireless mouse that has 24 hours of battery life, or 32 hours if you switch the LED lighting off.Logitech G900 CHAOS Spectrum Review @ Vortez
The internals certainly sound impressive, though the body of the mouse itself is painstakingly designed for universal comfort across all grip types, as well as being ambidextrous. This attention to detail falls down to even the mousewheel being hollowed out with a spoked design. The end result is a mouse that weighs just 107g, making it the lightest wireless gaming mouse available. It doesn't stop there, The mouse click buttons have been made using a pivot design to ensure a rapid, satisfying feedback no matter where you press.