I've been using the evaluation specially serviced to the mouse also can really judge useful awhile. I was important to be able to adjust the mouse on my hand, so that it fits comfortably in your hand. Since I've got the first disappointment with the length adjustment of the snap ring has been misplaced, without the adjustment is not possible. Missed parts may occur from out of me at cheap mice, but at Zalmann forgotten part without a major feature is not working kidding? Unfortunately, the mouse is too short for my hand. Although the angular design of the mouse looks nice, also does not help the ergonomics but, no matter what you like setting, they never really under control. Willmann lifting mover, then one may have to press the dial one of the side buttons or they are engaged so far forward that the butt sticks overweight at the bottom you have the feeling she slips every moment away (without additional weights). As long as I mouse with mouse pad is use very accurate and reliable, great is the switchable resolution, especially since you yourself can specify exactly the steps. In the Macro Programming others can considerably more. Overall, it makes more sense to buy a mouse that fits comfortably in your hand and really is without adjustment, technically there is enough equally good alternatives with similar price. 3 stars there for very precise technique, a star deduction for the missing piece and a miserable for ergonomics.