Meanwhile, I have the mouse for about 4 weeks and am very happy with it so far. She performs its service unobtrusively and is slightly larger than the LS1, so fits comfortably in your hand. The buttons function properly. On my desk (light wood decor) and also on white paper, the optical scanning works fine even in bright daylight. The cable length and the mouse wheel (with clearly noticeable notches) are ok. Special software I have not installed, but the mouse simply plugged and then reduced the mouse sensitivity in the operating system compared to the old mouse slightly. I notice in your daily work is not much difference to the old mouse.