This mouse is very comfortable, fits well in my smallish hands and acting very dibasic. Only the Mausradklick is much too sluggish. On Windows, the not often used, but for Linux it is very convenient because it is occupied by a spontaneous paste the selected text just elsewhere. You need all the time. Otherwise, a great mouse. However, one should shirk configuration necessarily the DPI button to turning up the sensitivity. But you have to do so only once. Had the Mausradknopf smoother, there is five star.
----- Addendum after 9 months
After nine months, the left mouse button Single and Double Click began to confuse. This is a shame, but at 15 euros reasonably expectable. Amazon, however, has without hesitation accepted the warranty. For the lack of durability, I subtract a star. Otherwise, the mouse was down to the stiff wheel button also not smooth running over the months was excellent.
