Very good performance wise and design wise.
It's very good because not only is it the most responsive mouse i bought but it can change between wired and wireless.
Great Mouse, very comfortable feel in hand
I bought this mouse along with the Black Widow Ultimate keyboard and Love them. The Mouse feels perfect in hand, can change the backlights of it, and can go between wireless and wired. If you buy this mouse then do not forget to download the free software for it from Razer's website so you can customize the buttons, sensitivity, light color, and sensitivity. I gave it a 9/10 because if you are on a budget then $130 dollars can be a little pricey, but worth splurging for since this is a great mouse.