accurate and versatile mouse :-)

at the packaging very good point two lids are provided at the back of the package to remove the back part is pre-cut with ease for once disconcerting compared to blister packs very rigid usual.
The presentation mouse is suitable for almost immediate use. The battery is already inserted in the mouse, its commissioning is blocked by a small wedge highly visible plastic.
The battery compartment has a space to store the dongle. Very handy if like me you already have connected equipment with a logitech unifying dongle .. it avoids losing the new dongle if you want to use it on other equipment.

I tested it on Windows 7.

Almost immediate recognition model by unifying tool logitech. If you do not already have the software, it will download it before use for windows 7. Windows 8 it seems that the software is not necessary (the explanatory note attached to the mouse)

Ergonomics pleasant, with good grip.

Wheel highly efficient and accurate enough progress.

small upper button handy for the double click function.

rear side button set default desktop display
front side button click the Start button.

click impeccable and right click and double click very well too ..

On materials, the side parts are pleasantly rough for a good grip, the upper part and a lot smoother, which does not make it less pleasant to the fingers and the palm of the hand.
The symmetry of the mouse makes it usable both for a right-handed than left-handed, except for the use of the two side buttons easier to use by a right-handed (use of thumb ..)
A very good mouse .. It not reach the comfort of a performance MX for example, but it comes close well ..