More than just "blah"

The MS 4000 is here listed as "4000 for Business USB bla" - I just hope that the "blah" real "black" is hot and should not be a disparaging remark about the mouse itself - this they would in any case definitely does not deserve ,

The negative first: the mouse does not work on all surfaces (eg not on the matt metalic surface of my Dell Inspiron notebooks, just as little on glass tables), the status LED is somewhat cryptic and the USB dongle ejection could be something more Power have (who has sausage fingers could get when pulling out the dongle problems).

Otherwise, I can not complain. The mouse works well on both Windows 8 and 8.1 as well as under Linux (tested with Ubuntu 14:04). The sampling rate is for business purposes fully in order, the connection is stable and the mouse wheel runs smoothly. Who gets sweaty hands could use the mouse wheel click have problems, but otherwise I see no problems whatsoever.

For the vulnerability there is a point deduction, remain well-deserved 4 stars.