Top mouse at a low price

I bought the mouse a year ago and has since worked every day
about 6-8h with your. The supplied batteries still hold and that although I never turn off the mouse!
Super I find the side keys and the soft, well integrated scroll wheel.
The first two reviews I can not understand at all, because my mouse
on almost any surface (except glass) very precisely performs its service.
+ Processing
+ Value for money
+ Gleiteingenschaft
+ Function keys (such as change-over switch for DPI)
+ Plug & Play (also works instantly with Windows 7)
+ Design (Carbon Look)
Ergonomics +
+ Side gumming
+ 6 keys (with 4-way scroll wheel)
- Only for right (but does not affect me)