False "ambidextrous" and qualities marred by errors ergonomics

This is a mouse aesthetically very successful, good quality workmanship at a really reasonable price, I tested Windows 7. It combines many qualities: laser sensor "all terrain" (works on glass), good slips (if somewhat noisy without a mouse pad), 2 buttons on the left side for advanced functions (previous / next title in the mp3-previous / next page in Internet browsers, etc. - all this is configurable if install the Logitech SetPoint software), receiver "Unifying" to connect multiple Logitech devices using a single receiver, freewheel mode, the AA battery longevity of 18 months depending on the manufacturer ...

This mouse does not mean perfect, starting with its dimensions that seem just a little for a desktop mouse: lack of curves and too short. It generally shows precise with sharp and pleasing clicks (and perhaps a little too sensitive.) It should however be forced not to click too close to the middle as the front of the mouse is made of a block (no separation of buttons), without which the right click is transformed simultaneously click the 2 buttons. It is clearly an aesthetic choice by the manufacturer at the expense of ergonomics, which especially hamper users 'advanced' and intensive. Similarly, roulette is not clickable, it may however assign this function to the button under the wheel ... which is unfortunately a little too far from the index and middle fingers.

The other thing that bothers me a lot is that this mouse is presented as suitable for both left and right handed. This is actually the case with my old Logitech VX Nano (great mouse, by the way), albeit with buttons placed on the left, are close to the front. On the M560, these buttons can be used only by the thumb of the right hand ... or the ring finger of the left hand. If you are left-handed, it is very difficult to use them (the more so because of the very indented shape of the mouse, which does not allow a free placement of hand, requires having not too large hands and causes regularly untimely clicks on main and side buttons ...) In short, this is absolutely not ergonomic if used left hand and you want to enjoy all the promised features. Eliminating faults for lefties!