I love mine, has absolutely perfect feedback on the buttons, tracking is perfect and the shape is tried and tested for a reason.
My only 2 criticisms of the mouse are every now and again i get a ghost spin on the wheel where it will scroll a half click and change my weapon and the coating is like a filth magnet, a sponge almost for skin grease.
I don't have greasy skin but the inevitable grease that you do get from 2 or 3 hour stints just clings to it.
spare feet as well which i personally have not had with other mice, i have owned a logitech performance MX that cost me around £60 when i purchased it, also a Razor Deathadder when first released that i am sure was in the £40-£50 region, sonot cheap mice by any stretch.