BOF, Logitech did much better

Cons:
- Poor accuracy of the wheel (difficult managing any horizontal scrolling incompatible with SMPlayer and other video viewing software using the knob to adjust the time slider, etc.)
- Bad cursor precision (impossible to draw a straight line)
- Zero functions of lateral movement of the knob (modifiable Windows ONLY and only if allowed Setpoint embark on each start and run in the background)
- More software in the background to keep the buttons function changes
- Compatibility "basic" with MAC and Linux ... not change the side of the knob functions defined by default.

Conclusion: prefer previous models of the same shape of the brand (eg M305 and B605)

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Within short:

This is my third logitech mouse.
3 have the same ergonomic profile which allows using it long without my wrist.

By cons unlike previous models (M305 and B605) the default function of the lateral movement of the central button is internet browsing "previous" and "next page" ... THE M ****. (Older models allow for a lateral navigation, a convenient 12 ")
This configuration can be modified m **** Windows software by running it "set point" in the background ... but not with other OS. In short, for the UBUNTU and MAC compatible, forget the "more" of Logitech wheels. It just becomes a basic mouse.
Otherwise I can not see myself actually draw a straight line with the mouse (as said in other reviews) ... the older models seems more accurate.
Other less: the lack of precision and sensitivity of the wheel makes the tedious vertical scrolling. Worse, disconnect the mouse with SMPlayer (video viewing software with exceptional ergonomics) and other video viewing software in which we could forward / backward in the video using the dial.

Otherwise it is supplied with 2 standard AA batteries: no interest for me that uses rechargeable batteries ... I would have preferred a house as transport for the B605.