One of the really great features of this mouse had to be the on-board memory which allows you to store settings and eliminates the need to install the software on the computer to use it. I was very much surprised and impressed by the LED features of the mouse. I like the ability to change between 7 different colors on the LEDs. On that note, this mouse had to be the most customizable I've ever had. I really came to appreciate the bleeding edge 5600DPI and the precision of the dual tracking lasers is quite astounding.