Ambidextrous ?????

After 4 days of testing, I returned the item for the following reasons:
- The thumb buttons are placed identically on the left and right: on one hand they are too small and not sufficiently differentiated -> you never know where you click; on the other side, it is pressed with a finger by mistake when we cling too strong mouse (approximately every minute for me ...)
- The software has NEVER detected my penny mouse mac OS X.8 -> obligatory passage by Windows to set (and then only setting that the mouse can remember.
-said Windows software is very ergonomic ..., no precise explanations, no mini-test software -> forced to launch an external application to make sure that the parameter I like.

For positive, skiing is just perfect and the management of accelerations (customizable setting) is very nice.

But hey, at this price, I think we deserve a perfect mouse with at least five usable buttons. This is not the case.