For once, a mouse who "is in the hands" well. It can be awarded with the thumb and ring / pinky hold and carry. The operation with the index finger and middle. Succeeds pleasant. Moving the cursor on the screen is uniform and smooth. Since the scanning optical occurs, no special mouse pad required and their use can be done in almost any smooth surface. This even works on linen tablecloths, newspapers u. Wood panels. Only surfaces that reflect and strong contrast change (z. B. glossy brochures) that cause unpleasant jumps the cursor on the screen. The build quality is solid and acts dibasic. the power cord is too short for desktop PCs, but for notebooks she agrees. The USB port, the mouse is detected easily. Since I am Linux user, the dissolution of 400dpi is optimal 800dpi mice left with me always an uneasy u. Nervous movement impression. The size of the mouse buttons is well matched to the Finger adult, the pressure point is precise and leaves a defined key touch. The switching Knacks is clear and without being intrusive to be loud and clearly provides a good acoustic feedback of the operation. Total me is worth 5 stars, especially since I have procured me this mouse the same for all computers in the family - to repent until now without it.