Unreasoning Purchase

I wanted a more precise mouse replacing that wireless, rather capricious I used more and far too heavy and very tiring in very little time. I ordered the M500 good comments with respect to which it is subject. Alas, if it suffers no criticism of the functioning point of view, it is heavier than the final wireless I, too important to hand, and even on the special mat, it slips very badly. So I unplugged the object, ran the first supermarket near my home, acquired a wired mouse with 2 francs 6 under me who "kills" not the wrist and slides beautifully, again, it is "full of light ".....
I think my offer to a friend M500 machine operator ....